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Finding the Fourth Proportional to 479,437.89, 661,640.17 and 261,658.48

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Solution

The fourth proportional to 479,437.89, 661,640.17 and 261,658.48 is: 361,097.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,437.89 : 661,640.17 = 261,658.48 : x
  2. Step 2: Convert to fraction form
    479,437.89/661,640.17 = 261,658.48/x
  3. Step 3: Cross multiply
    479,437.89x = 661,640.17 × 261,658.48
  4. Step 4: Simplify right side
    479,437.89x = 173,123,761,189.14
  5. Step 5: Solve for x
    x = 173,123,761,189.14/479,437.89
  6. Step 6: Final answer
    x = 361,097.37

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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.