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Finding the Third Proportional to 115.31 and 235.69

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Solution

The third proportional to 115.31 and 235.69 is: 481.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.31 : 235.69 = 235.69 : x
  2. Step 2: Convert to fraction form
    115.31/235.69 = 235.69/x
  3. Step 3: Cross multiply
    115.31x = 235.69 × 235.69
  4. Step 4: Simplify right side
    115.31x = 55,548.60
  5. Step 5: Solve for x
    x = 55,548.60/115.31
  6. Step 6: Final answer
    x = 481.72

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.