The phrase "a proportionate increase in" is correct and usable in written English.
It can be used when discussing changes or adjustments that are in line with a certain ratio or scale, often in contexts like economics, statistics, or project management.
Example: "The company reported a proportionate increase in sales following the new marketing strategy."
Alternatives: "an equivalent rise in" or "a corresponding growth in".
Our work showed that an increase in badger numbers does not lead to a proportionate increase in TB.
The remaining centers will have to serve up to 71 percent more patients, without a proportionate increase in staff, according to city figures provided to aldermen.
Returns to scale, in economics, the quantitative change in output of a firm or industry resulting from a proportionate increase in all inputs.
However, following recent share price weakness (which has not been accompanied by a proportionate increase in company-specific risk), we see the stock's risk/reward as increasingly compelling and add the stock to our buy list.
For instance, a recent article in The American Economic Review by Gilles Duranton and Matthew Turner shows that road construction in the United States typically leads to a proportionate increase in utilization, leaving congestion unchanged.
But the main reason that the government is now stuck with a park of largely unusable capacity is that power prices have increased significantly, without a proportionate increase in water prices.
The envelopment in CCR is constant returns to scale (CRS) meaning that a proportional increase (decrease) in inputs results in a proportionate increase (decrease) in outputs.
The dramatic change in medical student gender demographics has not been accompanied, however, by a proportionate increase of women in senior faculty ranks and leadership positions, even after the expected time lag.
Acknowledging the commitment of successive post-independence governments to address issues affecting children in its laws, policies and programmes, UNICEF called for a proportionate increase of budgetary allocation in the area of education, health and nutrition, which should not be lower than a minimum ceiling to sustain investments and gains of the past years.
Since each additional cluster represented a large proportionate increase in the study size (and in associated costs) it was necessary to find the proper balance between the need to increase the number of the clusters and its organizational costs.
If the constraint, which is put on this flux, is removed, all citrate produced is directed towards acetyl-CoA synthesis, resulting in a proportionate increase of lipid synthesis.
