Finding the Fourth Proportional to 396,421.28, 547,062.84 and 215,133.20
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Solution
The fourth proportional to 396,421.28, 547,062.84 and 215,133.20 is: 296,884.62
Step by Step Solution
- Step 1: Write the proportion equation
396,421.28 : 547,062.84 = 215,133.20 : x - Step 2: Convert to fraction form
396,421.28/547,062.84 = 215,133.20/x - Step 3: Cross multiply
396,421.28x = 547,062.84 × 215,133.20 - Step 4: Simplify right side
396,421.28x = 117,691,379,370.29 - Step 5: Solve for x
x = 117,691,379,370.29/396,421.28 - Step 6: Final answer
x = 296,884.62
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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.