"more than proportionally" is correct and can be used in written English.
It is typically used to describe a comparison between two things where one is significantly greater than the other in relation to their proportions. Example: "The company's profits increased more than proportionally compared to their expenses, leading to record-breaking earnings."
Also, R&D spending seems to rise more than proportionally with firm size after a certain threshold level has been reached.
Trade has always been more than proportionally affected by fluctuations in output, but the globalisation of the supply chain has increased its responsiveness.
Certainly performance has increased more than proportionally, but if extreme gamers are buying 1000W power supplies for their rigs, there's something crazy going on.
We assume that the marginal cost of bank lending increases more than proportionally as l b increases and decreases as z increases.
Each additional match increases the proceeds made by the stronger teams more than proportionally compared to the increase in proceeds made by the weaker teams.
As can be seen, the served passenger demand has increased more than proportionally with rising of GDP, thus indicating that GDP has generally been, is, and will continue to be a strong generator of demand in the given context.
Plasma concentrations of TAK-438 increased slightly more than dose proportionally.
Mean AUC0 inf and Cmax on Day 7 increased slightly more than dose proportionally over the range 10 40 mg.
C max and AUC0-24 showed a dose-dependent increase at doses from 500 to 850 mg, whereas increased slightly more than dose proportionally at dose of 850 mg, and showed high inter-individual variability.
Although the maximal concentration and total systemic exposure of recAP and AP activity increased slightly more than dose proportionally this is of no significance in the estimated therapeutic dose range.
The SOHO/UVCS data now indicate that coronal protons are in fact hot, and that heavy ions are more than mass-proportionally hotter; protons and ions are hotter than the electrons.
