Finding the Fourth Proportional to 687,909.14, 949,402.20 and 415,978.98
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Solution
The fourth proportional to 687,909.14, 949,402.20 and 415,978.98 is: 574,103.96
Step by Step Solution
- Step 1: Write the proportion equation
687,909.14 : 949,402.20 = 415,978.98 : x - Step 2: Convert to fraction form
687,909.14/949,402.20 = 415,978.98/x - Step 3: Cross multiply
687,909.14x = 949,402.20 × 415,978.98 - Step 4: Simplify right side
687,909.14x = 394,931,358,765.76 - Step 5: Solve for x
x = 394,931,358,765.76/687,909.14 - Step 6: Final answer
x = 574,103.96
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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.