1The company's profits are proportional to the number of units sold, so the more they sell, the more they earn.
2Is the punishment proportional to the crime, or is it excessively harsh?
3The new tax system aims to make taxation proportional to income, rather than a flat rate.
4Try to ensure that the rewards are proportional to the effort and achievement of each team member.
5There is a growing concern that the response to the crisis is not proportional to the scale of the problem.