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Finding the Third Proportional to 121.92 and 247.22

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Solution

The third proportional to 121.92 and 247.22 is: 501.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.92 : 247.22 = 247.22 : x
  2. Step 2: Convert to fraction form
    121.92/247.22 = 247.22/x
  3. Step 3: Cross multiply
    121.92x = 247.22 × 247.22
  4. Step 4: Simplify right side
    121.92x = 61,117.11
  5. Step 5: Solve for x
    x = 61,117.11/121.92
  6. Step 6: Final answer
    x = 501.28

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.