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Finding the Third Proportional to 199.13 and 349.31

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Solution

The third proportional to 199.13 and 349.31 is: 612.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.13 : 349.31 = 349.31 : x
  2. Step 2: Convert to fraction form
    199.13/349.31 = 349.31/x
  3. Step 3: Cross multiply
    199.13x = 349.31 × 349.31
  4. Step 4: Simplify right side
    199.13x = 122,019.22
  5. Step 5: Solve for x
    x = 122,019.22/199.13
  6. Step 6: Final answer
    x = 612.78

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Why These Related Problems?

These problems maintain the same ratio (1.75) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.