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Finding the Fourth Proportional to 391,569.15, 587,353.73 and 344,913.15

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Solution

The fourth proportional to 391,569.15, 587,353.73 and 344,913.15 is: 517,369.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,569.15 : 587,353.73 = 344,913.15 : x
  2. Step 2: Convert to fraction form
    391,569.15/587,353.73 = 344,913.15/x
  3. Step 3: Cross multiply
    391,569.15x = 587,353.73 × 344,913.15
  4. Step 4: Simplify right side
    391,569.15x = 202,586,023,453.98
  5. Step 5: Solve for x
    x = 202,586,023,453.98/391,569.15
  6. Step 6: Final answer
    x = 517,369.73

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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.