determine if 2.25/10, 9/40, 2.5/10, 90/40 or 2.25/12, 90/40 is a proportion

Answer 1

To determine if the given pairs are in proportion, we need to check if their cross products are equal.

First pair: 2.25/10 and 9/40

Cross product of the first pair: (2.25)(40) = (10)(9) = 90

Second pair: 2.25/12 and 90/40

Cross product of the second pair: (2.25)(40) = (12)(90) = 1080

Since the cross products of the pairs are not equal (90 ≠ 1080), the given pairs are not in proportion.