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Finding the Fourth Proportional to 418,406.53, 577,388.87 and 237,135.21

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Solution

The fourth proportional to 418,406.53, 577,388.87 and 237,135.21 is: 327,239.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,406.53 : 577,388.87 = 237,135.21 : x
  2. Step 2: Convert to fraction form
    418,406.53/577,388.87 = 237,135.21/x
  3. Step 3: Cross multiply
    418,406.53x = 577,388.87 × 237,135.21
  4. Step 4: Simplify right side
    418,406.53x = 136,919,229,753.44
  5. Step 5: Solve for x
    x = 136,919,229,753.44/418,406.53
  6. Step 6: Final answer
    x = 327,239.71

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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.