How can I find the value of each resistor if I only know RT. From what I know, R2 is 2x the Value of R1 and R3 is 3x the value of R1. I also know that RT is 3.6kΩ.

I initially though I would have to divide the RT by a number, but so far vie always been approximately 1k above or below the correct RT.

Also Apologies if I listed this in the wrong category, its Electronic Engineering for DC Circuits in Series but I figured Mathematics would suit this question better.