(4/3)*(15/32)=5/8
(3/4)*(5/6)=5/8
(4/3)*(15/32)=(3/4)*(5/6)
可以组成比例:内向积等于外向积.
4/3:3/4=5/6:15/32
4/3:5/6=3/4:15/32
15/32:5/6=3/4=4/3
15/32:3/4=5/6=4/3
等等
(4/3)*(15/32)=5/8
(3/4)*(5/6)=5/8
(4/3)*(15/32)=(3/4)*(5/6)
可以组成比例:内向积等于外向积.
4/3:3/4=5/6:15/32
4/3:5/6=3/4:15/32
15/32:5/6=3/4=4/3
15/32:3/4=5/6=4/3
等等