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Finding the Third Proportional to 115.59 and 172.97

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Solution

The third proportional to 115.59 and 172.97 is: 258.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.59 : 172.97 = 172.97 : x
  2. Step 2: Convert to fraction form
    115.59/172.97 = 172.97/x
  3. Step 3: Cross multiply
    115.59x = 172.97 × 172.97
  4. Step 4: Simplify right side
    115.59x = 29,918.19
  5. Step 5: Solve for x
    x = 29,918.19/115.59
  6. Step 6: Final answer
    x = 258.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.