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Finding the Third Proportional to 106.75 and 218.38

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Solution

The third proportional to 106.75 and 218.38 is: 446.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.75 : 218.38 = 218.38 : x
  2. Step 2: Convert to fraction form
    106.75/218.38 = 218.38/x
  3. Step 3: Cross multiply
    106.75x = 218.38 × 218.38
  4. Step 4: Simplify right side
    106.75x = 47,687.64
  5. Step 5: Solve for x
    x = 47,687.64/106.75
  6. Step 6: Final answer
    x = 446.72

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.