RATIO AND PROPORTION

RATIO AND PROPORTION

1.If a:b = c:d , then Product of Means=Product of Extremes i.e 2ndterm*3rdterm=1stterm*4thterm 2.Each part = Total Amount/Total of Ratios 3.If a:b = x:y & b:c = p:q ,then a:b:c = xp:yp:yq 4.Third proportion to 'x' & 'y' = y2/x 5.The mean proportion between 'a' & 'b' = Öab