Question

If x,y and z are in proportions then

Answer 1

Since x,y,z and w are in proportion,

x:y::z:w

So, we can say that, xy=zw { By taking product of extreme and product of 1

Answer 2

Since x,y,z and w are in proportion,

x:y::z:w

So, we can say that, xy=zw { By taking product of extreme and product of mean. }

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