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Finding the Fourth Proportional to 408.62, 564 and 261.38

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Solution

The fourth proportional to 408.62, 564 and 261.38 is: 360.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.62 : 564 = 261.38 : x
  2. Step 2: Convert to fraction form
    408.62/564 = 261.38/x
  3. Step 3: Cross multiply
    408.62x = 564 × 261.38
  4. Step 4: Simplify right side
    408.62x = 147,418.32
  5. Step 5: Solve for x
    x = 147,418.32/408.62
  6. Step 6: Final answer
    x = 360.77

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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.