1 upon 5 ratio 1 upon 4 proportion X ratio 1 upon 5
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1/5:1/4::x:1/5
product of extreme = product of mean
1/5×1/5=1/4×x
4/25=x......
hope this helps you....
product of extreme = product of mean
1/5×1/5=1/4×x
4/25=x......
hope this helps you....
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