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Finding the Fourth Proportional to 667,046.61, 920,523.18 and 361,122.87

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Solution

The fourth proportional to 667,046.61, 920,523.18 and 361,122.87 is: 498,348.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,046.61 : 920,523.18 = 361,122.87 : x
  2. Step 2: Convert to fraction form
    667,046.61/920,523.18 = 361,122.87/x
  3. Step 3: Cross multiply
    667,046.61x = 920,523.18 × 361,122.87
  4. Step 4: Simplify right side
    667,046.61x = 332,421,977,469.30
  5. Step 5: Solve for x
    x = 332,421,977,469.30/667,046.61
  6. Step 6: Final answer
    x = 498,348.95

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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.