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Finding the Fourth Proportional to 391,487.70, 587,275.91 and 351,259.53

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Solution

The fourth proportional to 391,487.70, 587,275.91 and 351,259.53 is: 526,929.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,487.70 : 587,275.91 = 351,259.53 : x
  2. Step 2: Convert to fraction form
    391,487.70/587,275.91 = 351,259.53/x
  3. Step 3: Cross multiply
    391,487.70x = 587,275.91 × 351,259.53
  4. Step 4: Simplify right side
    391,487.70x = 206,286,260,126.92
  5. Step 5: Solve for x
    x = 206,286,260,126.92/391,487.70
  6. Step 6: Final answer
    x = 526,929.10

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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.