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Finding the Fourth Proportional to 391,005.80, 586,508.70 and 251,037.80

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Solution

The fourth proportional to 391,005.80, 586,508.70 and 251,037.80 is: 376,556.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,005.80 : 586,508.70 = 251,037.80 : x
  2. Step 2: Convert to fraction form
    391,005.80/586,508.70 = 251,037.80/x
  3. Step 3: Cross multiply
    391,005.80x = 586,508.70 × 251,037.80
  4. Step 4: Simplify right side
    391,005.80x = 147,235,853,728.86
  5. Step 5: Solve for x
    x = 147,235,853,728.86/391,005.80
  6. Step 6: Final answer
    x = 376,556.70

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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.