题目内容
已知a:b=1.5:1
,b:c=
:
,求a:b:c.
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分析:因为a:b=1.5:1
=
:
=9:10,b:c=
:
=8:9=40:45,这时b都是40,假设b=40,则a=36,c=45,进而把a、b、c进行连比即可.
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解答:解:因为a:b=1.5:1
=
:
=9:10=36:40,
b:c=
:
=8:9=40:45,
则a:b:c=36:40:45.
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3 |
b:c=
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则a:b:c=36:40:45.
点评:利用最小公倍数求连比,即把中间的b运用比的基本性质转化为40,是解答此题的关键.
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