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Finding the Third Proportional to 379.97 and 788.91

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Solution

The third proportional to 379.97 and 788.91 is: 1,637.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.97 : 788.91 = 788.91 : x
  2. Step 2: Convert to fraction form
    379.97/788.91 = 788.91/x
  3. Step 3: Cross multiply
    379.97x = 788.91 × 788.91
  4. Step 4: Simplify right side
    379.97x = 622,373.07
  5. Step 5: Solve for x
    x = 622,373.07/379.97
  6. Step 6: Final answer
    x = 1,637.96

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.