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Finding the Fourth Proportional to 638,864.76, 958,920.39 and 527,677.68

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Solution

The fourth proportional to 638,864.76, 958,920.39 and 527,677.68 is: 792,031.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,864.76 : 958,920.39 = 527,677.68 : x
  2. Step 2: Convert to fraction form
    638,864.76/958,920.39 = 527,677.68/x
  3. Step 3: Cross multiply
    638,864.76x = 958,920.39 × 527,677.68
  4. Step 4: Simplify right side
    638,864.76x = 506,000,886,699.90
  5. Step 5: Solve for x
    x = 506,000,886,699.90/638,864.76
  6. Step 6: Final answer
    x = 792,031.30

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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.