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Finding the Third Proportional to 122.44 and 280.22

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Solution

The third proportional to 122.44 and 280.22 is: 641.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.44 : 280.22 = 280.22 : x
  2. Step 2: Convert to fraction form
    122.44/280.22 = 280.22/x
  3. Step 3: Cross multiply
    122.44x = 280.22 × 280.22
  4. Step 4: Simplify right side
    122.44x = 78,522.55
  5. Step 5: Solve for x
    x = 78,522.55/122.44
  6. Step 6: Final answer
    x = 641.33

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Why These Related Problems?

These problems maintain the same ratio (2.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.