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Finding the Third Proportional to 171.25 and 261.88

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Solution

The third proportional to 171.25 and 261.88 is: 400.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.25 : 261.88 = 261.88 : x
  2. Step 2: Convert to fraction form
    171.25/261.88 = 261.88/x
  3. Step 3: Cross multiply
    171.25x = 261.88 × 261.88
  4. Step 4: Simplify right side
    171.25x = 68,578.52
  5. Step 5: Solve for x
    x = 68,578.52/171.25
  6. Step 6: Final answer
    x = 400.46

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.