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Finding the Third Proportional to 135.38 and 218.06

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Solution

The third proportional to 135.38 and 218.06 is: 351.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.38 : 218.06 = 218.06 : x
  2. Step 2: Convert to fraction form
    135.38/218.06 = 218.06/x
  3. Step 3: Cross multiply
    135.38x = 218.06 × 218.06
  4. Step 4: Simplify right side
    135.38x = 47,551.25
  5. Step 5: Solve for x
    x = 47,551.25/135.38
  6. Step 6: Final answer
    x = 351.26

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.