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Finding the Fourth Proportional to 667,127.38, 920,624.71 and 361,201.31

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Solution

The fourth proportional to 667,127.38, 920,624.71 and 361,201.31 is: 498,451.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,127.38 : 920,624.71 = 361,201.31 : x
  2. Step 2: Convert to fraction form
    667,127.38/920,624.71 = 361,201.31/x
  3. Step 3: Cross multiply
    667,127.38x = 920,624.71 × 361,201.31
  4. Step 4: Simplify right side
    667,127.38x = 332,530,849,464.36
  5. Step 5: Solve for x
    x = 332,530,849,464.36/667,127.38
  6. Step 6: Final answer
    x = 498,451.81

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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.