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Finding the Third Proportional to 136.88 and 339.75

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Solution

The third proportional to 136.88 and 339.75 is: 843.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.88 : 339.75 = 339.75 : x
  2. Step 2: Convert to fraction form
    136.88/339.75 = 339.75/x
  3. Step 3: Cross multiply
    136.88x = 339.75 × 339.75
  4. Step 4: Simplify right side
    136.88x = 115,430.06
  5. Step 5: Solve for x
    x = 115,430.06/136.88
  6. Step 6: Final answer
    x = 843.32

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Why These Related Problems?

These problems maintain the same ratio (2.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.