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Show the ratio of the parts

3:1\mathbf{3 : 1} 3:1

3:2\mathbf{3 : 2} 3:2

???

4:7\mathbf{4 : 7} 4:7

1

3:3\mathbf{3 : 3} 3:3

2

Check

∣\duocursor∣

![][2] ![][3] ![][4] ![][5]789()456×÷123+-0. ![][6] %=