directly proportional

USAGE SUMMARY

"directly proportional" is correct and can be used in written English.
You would use it to describe a situation in which two things are proportional to each other in a direct way – the amount of one is equal to a certain corresponding amount of the other. For example: "The amount of time spent studying is directly proportional to the score achieved on the test."

✓ Grammatically correct

Science

News & Media

Formal & Business

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

"My diplomacy is directly proportional to the scoreboard," Parcells said.

The New York Times - Sports

Do you feel your creativity is directly proportional to your obtuseness?

The Guardian - Music

Attention to weight seems to be directly proportional to how far you are hiking.

The New York Times

"So anything that is damaged is directly proportional to this year's bleaching.

The Guardian

"Your heating load is directly proportional to the difference between outside and inside temperature," he said.

The New York Times

Many fade quickly, their longevity directly proportional to the longevity of the phenomena they name.

The New York Times

Of course, the reluctance to appear ambitious in politics is often directly proportional to actual ambition.

The New York Times

Exogenous exergy destruction is directly proportional to the association degree.

Applied Thermal Engineering

The oscillation frequency is directly proportional to the flow rate.

Microprocessors and Microsystems

Carbon loss from treatments was directly proportional to sediment loss.

Soil and Tillage Research

The Young's modulus values were directly proportional to ZrB2 content.

International Journal of Refractory Metals and Hard Materials

Expert writing Tips

Best practice

When describing relationships in scientific or mathematical contexts, ensure that the units of measurement are consistent to maintain accuracy when stating that one quantity is "directly proportional" to another.

Common error

Avoid assuming that because two variables are "directly proportional", one necessarily causes the other. Proportionality indicates a relationship, but not necessarily a causal link. Ensure that causality is established through other evidence or methods.

Linguistic Context

The phrase "directly proportional" functions as an adjectival phrase modifying a noun or clause, describing a specific type of relationship between two quantities or variables. Ludwig AI indicates that this term accurately portrays a situation where two quantities share a constant ratio.

Expression frequency: Very common

Frequent in

Science

50%

News & Media

30%

Formal & Business

20%

Less common in

Encyclopedias

0%

Wiki

0%

Reference

0%

Ludwig's WRAP-UP

The phrase "directly proportional" describes a fundamental relationship where two quantities increase or decrease together at a constant rate. As highlighted by Ludwig, this term is grammatically sound and frequently used in science, news, and business contexts. When employing this phrase, ensure you're accurately representing the relationship and avoid confusing correlation with causation. Remember to use alternatives like "directly proportionate" or "in direct proportion" for variety while maintaining precision.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

directly proportionate

Replaces 'proportional' with 'proportionate', implying a similar direct relationship but sometimes used in slightly more formal contexts.

directly correlated

Focuses on the statistical relationship, suggesting a direct link but with a statistical emphasis.

in direct proportion

Emphasizes the 'proportion' aspect, making the relationship explicit and mathematically oriented.

scales linearly with

Highlights the linear nature of the relationship, common in technical or scientific contexts.

varies directly with

Uses 'varies' to indicate how one quantity changes in relation to another.

increases linearly with

Specifies that as one quantity increases, the other increases at a constant rate.

is linearly related to

Highlights the linear connection between two quantities, often used in mathematics or statistics.

is commensurate with

Suggests that two things are in a harmonious or corresponding measure, implying a proportional relationship.

directly tied to

Indicates a strong, direct connection, though not necessarily quantifiable as a proportion.

reflects proportionally

Emphasizes that one thing mirrors or represents the other in a proportionate manner.

FAQs

How do you use "directly proportional" in a sentence?

Use "directly proportional" to describe a relationship where an increase in one variable results in a consistent increase in another. For example, "The effort exerted is "directly proportional" to the results achieved".

What is the difference between "directly proportional" and "inversely proportional"?

"Directly proportional" means that two quantities increase or decrease together. "Inversely proportional" means that as one quantity increases, the other decreases. Think of it this way: direct means 'together', inverse means 'opposite'.

What can I say instead of "directly proportional"?

Alternatives include "directly correlated", "in direct proportion", or "scales linearly with", depending on the context. Each of these alternatives carries a slightly different nuance.

Is it grammatically correct to say "directly proportional to"?

Yes, "directly proportional to" is the correct grammatical form. The phrase requires the preposition "to" to properly connect the two related elements. For instance, "The cost is directly proportional to the size".