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Finding the Fourth Proportional to 376,620, 519,781.68 and 217,644

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Solution

The fourth proportional to 376,620, 519,781.68 and 217,644 is: 300,375.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,620 : 519,781.68 = 217,644 : x
  2. Step 2: Convert to fraction form
    376,620/519,781.68 = 217,644/x
  3. Step 3: Cross multiply
    376,620x = 519,781.68 × 217,644
  4. Step 4: Simplify right side
    376,620x = 113,127,363,961.92
  5. Step 5: Solve for x
    x = 113,127,363,961.92/376,620
  6. Step 6: Final answer
    x = 300,375.35

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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.