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Finding the Fourth Proportional to 408.97, 564.38 and 234.31

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Solution

The fourth proportional to 408.97, 564.38 and 234.31 is: 323.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.97 : 564.38 = 234.31 : x
  2. Step 2: Convert to fraction form
    408.97/564.38 = 234.31/x
  3. Step 3: Cross multiply
    408.97x = 564.38 × 234.31
  4. Step 4: Simplify right side
    408.97x = 132,241.87
  5. Step 5: Solve for x
    x = 132,241.87/408.97
  6. Step 6: Final answer
    x = 323.35

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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.