Question

solve each proportion 1. 3:7=_:492. 2/5= 14/x state if the pair of ratios forms a proportion. 3. 4/9. and 40/81

Answer 1

The proportion above can be solved by ensuring that they amount to the same equivalent value. Here is what i mean:

`(3)/(7)\text{ = }\frac{3\text{ x 7}}{7\text{ x 7}}\text{ = }(21)/(49).\text{ The solution to number 1 is 21 because 7x7=47, then 3 times the same 7 = 21}`
`(2)/(5)\text{ = }\frac{2\text{ x 7}}{5\text{ x 7}}\text{ = }(14)/(35)\text{ The solution here is 35 ( 14/2 = 7, 7x 5 = 35 )}`

The ratio below does not form a proportion because