Question

If a,b,c,d are in proportion then ad
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Answer 1

Proportion is equality of two ratios.

The ratio of 2 to 3 is same as the ratio of 4to 6,i.e.

2:3=4:6

Therefore,thetworatios2:3and4:6areproportionateandwrittenas:

2:3:4:6andreadas

The ratio of 2 to 3 is same as that of 4 to 6.

 

If2:3=4:6,then

2×6=3×4,i.e.12=12,

Let two ratios a:b and c:d be proportionate,

i.e.  a : b : c : d

In the proportion a:b:c:d

Product of means=product of extremes.

If a:b=c:d,then

a×d=b×c