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Finding the Fourth Proportional to 376,781.86, 519,958.13 and 215,640.05

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Solution

The fourth proportional to 376,781.86, 519,958.13 and 215,640.05 is: 297,582.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,781.86 : 519,958.13 = 215,640.05 : x
  2. Step 2: Convert to fraction form
    376,781.86/519,958.13 = 215,640.05/x
  3. Step 3: Cross multiply
    376,781.86x = 519,958.13 × 215,640.05
  4. Step 4: Simplify right side
    376,781.86x = 112,123,797,372.80
  5. Step 5: Solve for x
    x = 112,123,797,372.80/376,781.86
  6. Step 6: Final answer
    x = 297,582.79

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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.