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Finding the Third Proportional to 349 and 396.25

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Solution

The third proportional to 349 and 396.25 is: 449.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    349 : 396.25 = 396.25 : x
  2. Step 2: Convert to fraction form
    349/396.25 = 396.25/x
  3. Step 3: Cross multiply
    349x = 396.25 × 396.25
  4. Step 4: Simplify right side
    349x = 157,014.06
  5. Step 5: Solve for x
    x = 157,014.06/349
  6. Step 6: Final answer
    x = 449.90

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.