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Finding the Fourth Proportional to 256.38, 354.09 and 252.97

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Solution

The fourth proportional to 256.38, 354.09 and 252.97 is: 349.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.38 : 354.09 = 252.97 : x
  2. Step 2: Convert to fraction form
    256.38/354.09 = 252.97/x
  3. Step 3: Cross multiply
    256.38x = 354.09 × 252.97
  4. Step 4: Simplify right side
    256.38x = 89,571.11
  5. Step 5: Solve for x
    x = 89,571.11/256.38
  6. Step 6: Final answer
    x = 349.38

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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.