Finding the Fourth Proportional to 718,751.60, 991,884.12 and 396,475.28
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Solution
The fourth proportional to 718,751.60, 991,884.12 and 396,475.28 is: 547,139.70
Step by Step Solution
- Step 1: Write the proportion equation
718,751.60 : 991,884.12 = 396,475.28 : x - Step 2: Convert to fraction form
718,751.60/991,884.12 = 396,475.28/x - Step 3: Cross multiply
718,751.60x = 991,884.12 × 396,475.28 - Step 4: Simplify right side
718,751.60x = 393,257,534,204.55 - Step 5: Solve for x
x = 393,257,534,204.55/718,751.60 - Step 6: Final answer
x = 547,139.70
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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.