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Finding the Third Proportional to 135.11 and 209.62

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Solution

The third proportional to 135.11 and 209.62 is: 325.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.11 : 209.62 = 209.62 : x
  2. Step 2: Convert to fraction form
    135.11/209.62 = 209.62/x
  3. Step 3: Cross multiply
    135.11x = 209.62 × 209.62
  4. Step 4: Simplify right side
    135.11x = 43,940.18
  5. Step 5: Solve for x
    x = 43,940.18/135.11
  6. Step 6: Final answer
    x = 325.23

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.