Find the fourth proportional to 2/3,3/5,2

Answers (1)

Let the fourth proportional be x,then frac23,frac35,2,x are in proportion.
By using cross-product rule,we get
frac23	imes x=frac35	imes2
Rightarrow x=frac35	imes2	imesfrac32=frac95=1.8

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