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Finding the Third Proportional to 123.38 and 261.75

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Solution

The third proportional to 123.38 and 261.75 is: 555.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.38 : 261.75 = 261.75 : x
  2. Step 2: Convert to fraction form
    123.38/261.75 = 261.75/x
  3. Step 3: Cross multiply
    123.38x = 261.75 × 261.75
  4. Step 4: Simplify right side
    123.38x = 68,513.06
  5. Step 5: Solve for x
    x = 68,513.06/123.38
  6. Step 6: Final answer
    x = 555.32

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.