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Finding the Fourth Proportional to 391,154.20, 587,259.30 and 251,186.20

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Solution

The fourth proportional to 391,154.20, 587,259.30 and 251,186.20 is: 377,118.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,154.20 : 587,259.30 = 251,186.20 : x
  2. Step 2: Convert to fraction form
    391,154.20/587,259.30 = 251,186.20/x
  3. Step 3: Cross multiply
    391,154.20x = 587,259.30 × 251,186.20
  4. Step 4: Simplify right side
    391,154.20x = 147,511,431,981.66
  5. Step 5: Solve for x
    x = 147,511,431,981.66/391,154.20
  6. Step 6: Final answer
    x = 377,118.36

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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.