Using proportions, it is found that the length of MN is of 48 inches long.
A proportion is a fraction of a total amount, and the measures are related using a rule of three.
MP = 8 and PN is 5 times as long as MP, hence:
PN = 5 x 8 = 40.
Then:
MN = MP + PN = 8 + 40 = 48 inches long.
More can be learned about proportions at https://brainly.com/question/24372153
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