Use cross products to see if each pair of ratios forms a proportion. Replace each box with = or ≠.

Answer 1

1) 2/3 and 4/6

2/3 = 4/6

2) 5/8 and 10/16

5/8 = 10/16

3) 3/4 and 9/12

3/4 = 9/12

4) 7/10 and 14/20

7/10 = 14/20