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Finding the Third Proportional to 135.66 and 212.20

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Solution

The third proportional to 135.66 and 212.20 is: 331.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.66 : 212.20 = 212.20 : x
  2. Step 2: Convert to fraction form
    135.66/212.20 = 212.20/x
  3. Step 3: Cross multiply
    135.66x = 212.20 × 212.20
  4. Step 4: Simplify right side
    135.66x = 45,030.17
  5. Step 5: Solve for x
    x = 45,030.17/135.66
  6. Step 6: Final answer
    x = 331.94

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.