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Finding the Third Proportional to 71.19 and 155.20

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Solution

The third proportional to 71.19 and 155.20 is: 338.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.19 : 155.20 = 155.20 : x
  2. Step 2: Convert to fraction form
    71.19/155.20 = 155.20/x
  3. Step 3: Cross multiply
    71.19x = 155.20 × 155.20
  4. Step 4: Simplify right side
    71.19x = 24,086.19
  5. Step 5: Solve for x
    x = 24,086.19/71.19
  6. Step 6: Final answer
    x = 338.33

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.