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Finding the Third Proportional to 379.13 and 672.19

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Solution

The third proportional to 379.13 and 672.19 is: 1,191.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.13 : 672.19 = 672.19 : x
  2. Step 2: Convert to fraction form
    379.13/672.19 = 672.19/x
  3. Step 3: Cross multiply
    379.13x = 672.19 × 672.19
  4. Step 4: Simplify right side
    379.13x = 451,836.04
  5. Step 5: Solve for x
    x = 451,836.04/379.13
  6. Step 6: Final answer
    x = 1,191.79

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Why These Related Problems?

These problems maintain the same ratio (1.77) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.