Finding the Fourth Proportional to 438,426.10, 657,639.15 and 413,931.70
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Solution
The fourth proportional to 438,426.10, 657,639.15 and 413,931.70 is: 620,897.55
Step by Step Solution
- Step 1: Write the proportion equation
438,426.10 : 657,639.15 = 413,931.70 : x - Step 2: Convert to fraction form
438,426.10/657,639.15 = 413,931.70/x - Step 3: Cross multiply
438,426.10x = 657,639.15 × 413,931.70 - Step 4: Simplify right side
438,426.10x = 272,217,691,346.06 - Step 5: Solve for x
x = 272,217,691,346.06/438,426.10 - Step 6: Final answer
x = 620,897.55
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.