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Finding the Fourth Proportional to 391,874.66, 537,264.72 and 384,788.78

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Solution

The fourth proportional to 391,874.66, 537,264.72 and 384,788.78 is: 527,549.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,874.66 : 537,264.72 = 384,788.78 : x
  2. Step 2: Convert to fraction form
    391,874.66/537,264.72 = 384,788.78/x
  3. Step 3: Cross multiply
    391,874.66x = 537,264.72 × 384,788.78
  4. Step 4: Simplify right side
    391,874.66x = 206,733,433,459.52
  5. Step 5: Solve for x
    x = 206,733,433,459.52/391,874.66
  6. Step 6: Final answer
    x = 527,549.90

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.