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Finding the Fourth Proportional to 667,349.64, 920,937.92 and 361,418.98

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Solution

The fourth proportional to 667,349.64, 920,937.92 and 361,418.98 is: 498,755.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,349.64 : 920,937.92 = 361,418.98 : x
  2. Step 2: Convert to fraction form
    667,349.64/920,937.92 = 361,418.98/x
  3. Step 3: Cross multiply
    667,349.64x = 920,937.92 × 361,418.98
  4. Step 4: Simplify right side
    667,349.64x = 332,844,443,689.72
  5. Step 5: Solve for x
    x = 332,844,443,689.72/667,349.64
  6. Step 6: Final answer
    x = 498,755.71

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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.