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Finding the Third Proportional to 113.44 and 218.56

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Solution

The third proportional to 113.44 and 218.56 is: 421.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.44 : 218.56 = 218.56 : x
  2. Step 2: Convert to fraction form
    113.44/218.56 = 218.56/x
  3. Step 3: Cross multiply
    113.44x = 218.56 × 218.56
  4. Step 4: Simplify right side
    113.44x = 47,769.57
  5. Step 5: Solve for x
    x = 47,769.57/113.44
  6. Step 6: Final answer
    x = 421.11

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Why These Related Problems?

These problems maintain the same ratio (1.93) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.