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Finding the Third Proportional to 204.38 and 287.06

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Solution

The third proportional to 204.38 and 287.06 is: 403.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.38 : 287.06 = 287.06 : x
  2. Step 2: Convert to fraction form
    204.38/287.06 = 287.06/x
  3. Step 3: Cross multiply
    204.38x = 287.06 × 287.06
  4. Step 4: Simplify right side
    204.38x = 82,404.88
  5. Step 5: Solve for x
    x = 82,404.88/204.38
  6. Step 6: Final answer
    x = 403.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.