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It is known that the two external terms of a proportion are 3 and 1 / 4 respectively, and the ratio of the two ratios of a proportion is 1 / 2, which is ()
3: 6 = 1 / 8:1 / 2
In a ratio, the ratio of the two ratios is 2. The two external terms of the ratio are 1 / 4 and 1 / 5 respectively. What is the ratio
1/4:2=1/8
2*1/5=2/5
The ratio is 1 / 4:1 / 8 = 2 / 5:1 / 5
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