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Finding the Third Proportional to 199.13 and 280.13

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Solution

The third proportional to 199.13 and 280.13 is: 394.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.13 : 280.13 = 280.13 : x
  2. Step 2: Convert to fraction form
    199.13/280.13 = 280.13/x
  3. Step 3: Cross multiply
    199.13x = 280.13 × 280.13
  4. Step 4: Simplify right side
    199.13x = 78,470.02
  5. Step 5: Solve for x
    x = 78,470.02/199.13
  6. Step 6: Final answer
    x = 394.07

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.