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Finding the Third Proportional to 115.17 and 257.48

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Solution

The third proportional to 115.17 and 257.48 is: 575.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.17 : 257.48 = 257.48 : x
  2. Step 2: Convert to fraction form
    115.17/257.48 = 257.48/x
  3. Step 3: Cross multiply
    115.17x = 257.48 × 257.48
  4. Step 4: Simplify right side
    115.17x = 66,298.20
  5. Step 5: Solve for x
    x = 66,298.20/115.17
  6. Step 6: Final answer
    x = 575.65

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Why These Related Problems?

These problems maintain the same ratio (2.24) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.