数学题:一个长方形的长是8㎝，宽是6㎝;另一个，长方形的宽是9厘米，长是12厘米。如何按照一定的比例把小长方形扩大成与大长方形完全重的图形？（由王洋军同学提问）

数学题解答：先看第一个长方形，长宽比是：8:6=4:3

第二个长方形，长宽比是：12:9=4:3

所以两个长方形的形状是相同的，只是大小不同。

现在来解决问题，小长方形如果想与大长方形重合，则需要把长和宽都按照1.5:1的比例尺扩大，因为：

12:8=1.5:1

9:6=1.5:1

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