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Finding the Third Proportional to 120.66 and 193.22

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Solution

The third proportional to 120.66 and 193.22 is: 309.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.66 : 193.22 = 193.22 : x
  2. Step 2: Convert to fraction form
    120.66/193.22 = 193.22/x
  3. Step 3: Cross multiply
    120.66x = 193.22 × 193.22
  4. Step 4: Simplify right side
    120.66x = 37,333.49
  5. Step 5: Solve for x
    x = 37,333.49/120.66
  6. Step 6: Final answer
    x = 309.42

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.