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Finding the Third Proportional to 354.38 and 551.81

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Solution

The third proportional to 354.38 and 551.81 is: 859.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.38 : 551.81 = 551.81 : x
  2. Step 2: Convert to fraction form
    354.38/551.81 = 551.81/x
  3. Step 3: Cross multiply
    354.38x = 551.81 × 551.81
  4. Step 4: Simplify right side
    354.38x = 304,497.04
  5. Step 5: Solve for x
    x = 304,497.04/354.38
  6. Step 6: Final answer
    x = 859.25

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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.