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Finding the Fourth Proportional to 408.87, 564.44 and 234.18

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Solution

The fourth proportional to 408.87, 564.44 and 234.18 is: 323.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.87 : 564.44 = 234.18 : x
  2. Step 2: Convert to fraction form
    408.87/564.44 = 234.18/x
  3. Step 3: Cross multiply
    408.87x = 564.44 × 234.18
  4. Step 4: Simplify right side
    408.87x = 132,179.39
  5. Step 5: Solve for x
    x = 132,179.39/408.87
  6. Step 6: Final answer
    x = 323.28

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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.