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Finding the Fourth Proportional to 391,569.90, 587,354.85 and 344,913.90

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Solution

The fourth proportional to 391,569.90, 587,354.85 and 344,913.90 is: 517,370.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,569.90 : 587,354.85 = 344,913.90 : x
  2. Step 2: Convert to fraction form
    391,569.90/587,354.85 = 344,913.90/x
  3. Step 3: Cross multiply
    391,569.90x = 587,354.85 × 344,913.90
  4. Step 4: Simplify right side
    391,569.90x = 202,586,851,997.42
  5. Step 5: Solve for x
    x = 202,586,851,997.42/391,569.90
  6. Step 6: Final answer
    x = 517,370.85

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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.