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Finding the Fourth Proportional to 391,859.80, 587,789.70 and 96,371.80

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Solution

The fourth proportional to 391,859.80, 587,789.70 and 96,371.80 is: 144,557.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,859.80 : 587,789.70 = 96,371.80 : x
  2. Step 2: Convert to fraction form
    391,859.80/587,789.70 = 96,371.80/x
  3. Step 3: Cross multiply
    391,859.80x = 587,789.70 × 96,371.80
  4. Step 4: Simplify right side
    391,859.80x = 56,646,351,410.46
  5. Step 5: Solve for x
    x = 56,646,351,410.46/391,859.80
  6. Step 6: Final answer
    x = 144,557.70

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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.