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Finding the Fourth Proportional to 391,906.32, 540,834.12 and 222,108.72

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Solution

The fourth proportional to 391,906.32, 540,834.12 and 222,108.72 is: 306,511.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,906.32 : 540,834.12 = 222,108.72 : x
  2. Step 2: Convert to fraction form
    391,906.32/540,834.12 = 222,108.72/x
  3. Step 3: Cross multiply
    391,906.32x = 540,834.12 × 222,108.72
  4. Step 4: Simplify right side
    391,906.32x = 120,123,974,125.53
  5. Step 5: Solve for x
    x = 120,123,974,125.53/391,906.32
  6. Step 6: Final answer
    x = 306,511.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.