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Finding the Fourth Proportional to 667,367.73, 920,962.80 and 361,437.21

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Solution

The fourth proportional to 667,367.73, 920,962.80 and 361,437.21 is: 498,780.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,367.73 : 920,962.80 = 361,437.21 : x
  2. Step 2: Convert to fraction form
    667,367.73/920,962.80 = 361,437.21/x
  3. Step 3: Cross multiply
    667,367.73x = 920,962.80 × 361,437.21
  4. Step 4: Simplify right side
    667,367.73x = 332,870,224,945.79
  5. Step 5: Solve for x
    x = 332,870,224,945.79/667,367.73
  6. Step 6: Final answer
    x = 498,780.82

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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.