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Finding the Third Proportional to 128.88 and 226.44

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Solution

The third proportional to 128.88 and 226.44 is: 397.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128.88 : 226.44 = 226.44 : x
  2. Step 2: Convert to fraction form
    128.88/226.44 = 226.44/x
  3. Step 3: Cross multiply
    128.88x = 226.44 × 226.44
  4. Step 4: Simplify right side
    128.88x = 51,273.94
  5. Step 5: Solve for x
    x = 51,273.94/128.88
  6. Step 6: Final answer
    x = 397.86

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Why These Related Problems?

These problems maintain the same ratio (1.76) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.