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Finding the Third Proportional to 115.31 and 272.53

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Solution

The third proportional to 115.31 and 272.53 is: 644.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.31 : 272.53 = 272.53 : x
  2. Step 2: Convert to fraction form
    115.31/272.53 = 272.53/x
  3. Step 3: Cross multiply
    115.31x = 272.53 × 272.53
  4. Step 4: Simplify right side
    115.31x = 74,273.28
  5. Step 5: Solve for x
    x = 74,273.28/115.31
  6. Step 6: Final answer
    x = 644.10

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Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.