For the problem of calculating the proportional value, please post the formula process, It costs 23000 yuan for the three of them to buy a thing together, 6440 yuan for a, 6900 yuan for B and 9660 yuan for C. what's the correct ratio of the three of them? Please post the answer formula,

For the problem of calculating the proportional value, please post the formula process, It costs 23000 yuan for the three of them to buy a thing together, 6440 yuan for a, 6900 yuan for B and 9660 yuan for C. what's the correct ratio of the three of them? Please post the answer formula,

A:
A: B: C = 6440:6900:9660 (also divided by 20) = 322:345:483