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Finding the Third Proportional to 396.50 and 502.50

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Solution

The third proportional to 396.50 and 502.50 is: 636.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.50 : 502.50 = 502.50 : x
  2. Step 2: Convert to fraction form
    396.50/502.50 = 502.50/x
  3. Step 3: Cross multiply
    396.50x = 502.50 × 502.50
  4. Step 4: Simplify right side
    396.50x = 252,506.25
  5. Step 5: Solve for x
    x = 252,506.25/396.50
  6. Step 6: Final answer
    x = 636.84

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Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.