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Finding the Third Proportional to 163.25 and 252.75

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Solution

The third proportional to 163.25 and 252.75 is: 391.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.25 : 252.75 = 252.75 : x
  2. Step 2: Convert to fraction form
    163.25/252.75 = 252.75/x
  3. Step 3: Cross multiply
    163.25x = 252.75 × 252.75
  4. Step 4: Simplify right side
    163.25x = 63,882.56
  5. Step 5: Solve for x
    x = 63,882.56/163.25
  6. Step 6: Final answer
    x = 391.32

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.