Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Proportions
Twenty-five problems present a variety of practice solving proportions using various methods. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View...
Wyzant
Wyzant: Proportion Basics
WyzAnt provides an explanation and examples on solving proportions. Proportions practice problems and a proportion calculator are included in this lesson.