/prəˈpɔːr.ʃən.ət.li/
adjective
proportional
~ (to sth)increasing or decreasing in size, amount or degree according to changes in sth else 成比例的；相称的
Salary is proportional to years of experience.
薪金视资历而定。
to be directly/inversely proportional to sth
与某事物成正比／反比