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Finding the Third Proportional to 381.38 and 551.44

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Solution

The third proportional to 381.38 and 551.44 is: 797.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.38 : 551.44 = 551.44 : x
  2. Step 2: Convert to fraction form
    381.38/551.44 = 551.44/x
  3. Step 3: Cross multiply
    381.38x = 551.44 × 551.44
  4. Step 4: Simplify right side
    381.38x = 304,083.32
  5. Step 5: Solve for x
    x = 304,083.32/381.38
  6. Step 6: Final answer
    x = 797.33

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.