Four brothers split amounts

Question

A load of coal was divided between 4 four brothers the first received ⅓ the second received ⅖ the third received 1/7 and the fourth received 273 kg

Find the original mass of coal and how much the first brother received

Answer 1

4th=273kg

3th=(1/7)*273=39kg

2nd=(2/5)*273=109.2kg

1st=(1/3)*273=91kg

Now add all the masses:

273+39+109.2+91=512.2kg

So,

The original mass of the coal was 512.2 kg and the 1st brother received 91 kg