Finding the Fourth Proportional to 387,938.05, 535,349.36 and 218,172.17
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Solution
The fourth proportional to 387,938.05, 535,349.36 and 218,172.17 is: 301,074.70
Step by Step Solution
- Step 1: Write the proportion equation
387,938.05 : 535,349.36 = 218,172.17 : x - Step 2: Convert to fraction form
387,938.05/535,349.36 = 218,172.17/x - Step 3: Cross multiply
387,938.05x = 535,349.36 × 218,172.17 - Step 4: Simplify right side
387,938.05x = 116,798,331,579.31 - Step 5: Solve for x
x = 116,798,331,579.31/387,938.05 - Step 6: Final answer
x = 301,074.70
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.