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Finding the Third Proportional to 252.88 and 404.38

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Solution

The third proportional to 252.88 and 404.38 is: 646.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.88 : 404.38 = 404.38 : x
  2. Step 2: Convert to fraction form
    252.88/404.38 = 404.38/x
  3. Step 3: Cross multiply
    252.88x = 404.38 × 404.38
  4. Step 4: Simplify right side
    252.88x = 163,519.14
  5. Step 5: Solve for x
    x = 163,519.14/252.88
  6. Step 6: Final answer
    x = 646.64

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.