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Finding the Fourth Proportional to 671.09, 925.90 and 408.92

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Solution

The fourth proportional to 671.09, 925.90 and 408.92 is: 564.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.09 : 925.90 = 408.92 : x
  2. Step 2: Convert to fraction form
    671.09/925.90 = 408.92/x
  3. Step 3: Cross multiply
    671.09x = 925.90 × 408.92
  4. Step 4: Simplify right side
    671.09x = 378,613.38
  5. Step 5: Solve for x
    x = 378,613.38/671.09
  6. Step 6: Final answer
    x = 564.18

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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.