determine which set of ratios form a proportion
To determine which set of ratios form a proportion, you can cross multiply and see if the products are equal.
For example, let's say you have the following ratios:
1. 2/3 and 4/6
2. 5/10 and 3/6
3. 7/10 and 21/30
To determine if these ratios form a proportion, you can cross multiply:
1. (2*6) = (3*4) -> 12 = 12 (equal products, so they form a proportion)
2. (5*6) = (10*3) -> 30 = 30 (equal products, so they form a proportion)
3. (7*30) = (10*21) -> 210 = 210 (equal products, so they form a proportion)
Therefore, sets 1, 2, and 3 all form proportions.