# Find the mean proportional between i-)1.25 and 1.8 ii-)253 and27

1. Mean proportional between 1.25 and 1.8$=\sqrt{1.25\times1.8}$ = $\sqrt{2.25}$ = $1.5$
2. Mean proportional between $\frac{25}{3}$ and  $27$$\sqrt{\frac{25}{3}\times27}=\sqrt{25\times9}=\sqrt{225}=15$

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