Question

两个比值都是三分之二,而两个外项的积是12的比例式有哪些?

Answer 1

1/1.5 = 8/12

2/3 = 4/6

4/6 = 2/3

5/7.5 = 1.8/2.4

6/9 = (4/3)/2

8/12 = 1/1.5

......

还有很多.