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Finding the Fourth Proportional to 667,387.73, 920,997.81 and 361,467.74

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Solution

The fourth proportional to 667,387.73, 920,997.81 and 361,467.74 is: 498,826.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,387.73 : 920,997.81 = 361,467.74 : x
  2. Step 2: Convert to fraction form
    667,387.73/920,997.81 = 361,467.74/x
  3. Step 3: Cross multiply
    667,387.73x = 920,997.81 × 361,467.74
  4. Step 4: Simplify right side
    667,387.73x = 332,910,992,320.66
  5. Step 5: Solve for x
    x = 332,910,992,320.66/667,387.73
  6. Step 6: Final answer
    x = 498,826.96

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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.