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Finding the Third Proportional to 392.38 and 853.13

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Solution

The third proportional to 392.38 and 853.13 is: 1,854.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.38 : 853.13 = 853.13 : x
  2. Step 2: Convert to fraction form
    392.38/853.13 = 853.13/x
  3. Step 3: Cross multiply
    392.38x = 853.13 × 853.13
  4. Step 4: Simplify right side
    392.38x = 727,822.27
  5. Step 5: Solve for x
    x = 727,822.27/392.38
  6. Step 6: Final answer
    x = 1,854.91

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.