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Finding the Fourth Proportional to 391,609.20, 587,414.25 and 107,302.17

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Solution

The fourth proportional to 391,609.20, 587,414.25 and 107,302.17 is: 160,953.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,609.20 : 587,414.25 = 107,302.17 : x
  2. Step 2: Convert to fraction form
    391,609.20/587,414.25 = 107,302.17/x
  3. Step 3: Cross multiply
    391,609.20x = 587,414.25 × 107,302.17
  4. Step 4: Simplify right side
    391,609.20x = 63,030,823,713.92
  5. Step 5: Solve for x
    x = 63,030,823,713.92/391,609.20
  6. Step 6: Final answer
    x = 160,953.38

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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.