已知x:y=0.5:0.3,y:z=1/5:1/2,求x:y:z.

问题描述:

已知x:y=0.5:0.3,y:z=

1
5
1
2
,求x:y:z.

因为x:y=0.5:0.3=5:3,
所以x=

5
3
y;
因为y:z=
1
5
1
2
=2:5,
所以z=
5
2
y;
则x:y:z,
=
5
3
y:y:
5
2
y,
=
5
3
:1:
5
2

=10:6:15.