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Finding the Third Proportional to 207.69 and 287.97

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Solution

The third proportional to 207.69 and 287.97 is: 399.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.69 : 287.97 = 287.97 : x
  2. Step 2: Convert to fraction form
    207.69/287.97 = 287.97/x
  3. Step 3: Cross multiply
    207.69x = 287.97 × 287.97
  4. Step 4: Simplify right side
    207.69x = 82,926.00
  5. Step 5: Solve for x
    x = 82,926.00/207.69
  6. Step 6: Final answer
    x = 399.28

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.