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