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Finding the Third Proportional to 391.94 and 837.88

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Solution

The third proportional to 391.94 and 837.88 is: 1,791.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.94 : 837.88 = 837.88 : x
  2. Step 2: Convert to fraction form
    391.94/837.88 = 837.88/x
  3. Step 3: Cross multiply
    391.94x = 837.88 × 837.88
  4. Step 4: Simplify right side
    391.94x = 702,034.52
  5. Step 5: Solve for x
    x = 702,034.52/391.94
  6. Step 6: Final answer
    x = 1,791.19

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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.