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Finding the Fourth Proportional to 391,572.90, 587,359.35 and 386,324.10

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Solution

The fourth proportional to 391,572.90, 587,359.35 and 386,324.10 is: 579,486.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,572.90 : 587,359.35 = 386,324.10 : x
  2. Step 2: Convert to fraction form
    391,572.90/587,359.35 = 386,324.10/x
  3. Step 3: Cross multiply
    391,572.90x = 587,359.35 × 386,324.10
  4. Step 4: Simplify right side
    391,572.90x = 226,911,072,265.34
  5. Step 5: Solve for x
    x = 226,911,072,265.34/391,572.90
  6. Step 6: Final answer
    x = 579,486.15

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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.