The phrase "according to the proportion of" is correct and usable in written English.
It can be used when discussing relationships or ratios between different quantities or elements.
Example: "The budget will be allocated according to the proportion of each department's needs."
Alternatives: "in relation to the ratio of" or "based on the share of".
Spending also tends to vary according to the proportion of elderly people in the population.
Sphere-forming efficiency was calculated after 14 days according to the proportion of wells with tumorspheres versus initially seeded wells.
The Manson-Coffin diagram exhibited two regimes according to the proportion of grains involved in the plastic deformation accommodation.
Secondary schools will no longer be ranked according to the proportion of students getting 5 or more A*-C GCSE grades (including English and maths) alone.
Renderers who buy raw used grease put a sample in a centrifuge, spin off the sediments, and pay according to the proportion of pure grease.
Money, Federal officials said, will be distributed according to the proportion of students receiving Federal Title I funds, which are based on poverty.
The potentiostatic current-potential curves of nickel in nitric acid solutions can be classified into three categories, according to the proportion of the concentration of the acid.
The risk of biochemical recurrence (BCR) following radical prostatectomy for pathologic Gleason 7 prostate cancer varies according to the proportion of Gleason 4 component.
They announced their results in the form of three laws, according to the proportion of hydrogen and oxygen contained in the substances.
In another constitutional reform, the voters faced a new two-tier system in which an additional 100 party-list seats will be filled according to the proportion of votes received by each party.
Rather than facing off in a winner-takes-all contest, parties competing in a given district will be awarded seats according to the proportion of the vote that they win.
