" If "1,2,3," and "x" are in proportion,then "x=1

If x + 1, x-3,x+6 and x are in proportion, then x= _____

If 2x+1, x+2, 2 and 5 are in proportion, then what is the mean proportional between 3.5(1-x) and 8(1+x)? यदि 2x+1, x+2, 2 और 5 समानुपात में हैं, तो 3.5(1-x) एवं 8(1+x) के बीच माध्य समानुपाती ज्ञात करें |

If x and y are in direct proportion, then (x – 1) and (y – 1) are also in direct proportion

If x and y are in inverse proportion, then (x + 1) and (y + 1) are also in inverse proportion

If (x + 4), (x + 12), (x - 1), and (x + 5) are in proportion then the mean proportional between x and (x - 7)is: