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Finding the Third Proportional to 115.38 and 177.40

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Solution

The third proportional to 115.38 and 177.40 is: 272.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.38 : 177.40 = 177.40 : x
  2. Step 2: Convert to fraction form
    115.38/177.40 = 177.40/x
  3. Step 3: Cross multiply
    115.38x = 177.40 × 177.40
  4. Step 4: Simplify right side
    115.38x = 31,470.21
  5. Step 5: Solve for x
    x = 31,470.21/115.38
  6. Step 6: Final answer
    x = 272.75

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.