Question

已知a,b,c,d是成比例线段,且a=6dm,b=3dm.d=3/2dm,则c的长度为

Answer 1

a:b=c:d;

6:3=c:3/2;

3c=9;

c=3dm；

或a:d=b:c;

6:3/2=3:c;

c=9/2/6;

c=3/4dm