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Finding the Third Proportional to 379.31 and 813.19

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Solution

The third proportional to 379.31 and 813.19 is: 1,743.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.31 : 813.19 = 813.19 : x
  2. Step 2: Convert to fraction form
    379.31/813.19 = 813.19/x
  3. Step 3: Cross multiply
    379.31x = 813.19 × 813.19
  4. Step 4: Simplify right side
    379.31x = 661,273.91
  5. Step 5: Solve for x
    x = 661,273.91/379.31
  6. Step 6: Final answer
    x = 1,743.35

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.