Question

check if they are in proportion of 12:3::4:1​

Answer 1

Answer:

12:3::4:1

to check whether it is proportion mulitply the means and extremes

if product of means is equal to product of extreme then the above expression is proportional

so

mean is 3×4

Extreme is 12×1

3×4=12×1

so 12=12

mean =extreme

so the above expression is proportional