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Finding the Third Proportional to 681.47 and 1,393.45

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Solution

The third proportional to 681.47 and 1,393.45 is: 2,849.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.47 : 1,393.45 = 1,393.45 : x
  2. Step 2: Convert to fraction form
    681.47/1,393.45 = 1,393.45/x
  3. Step 3: Cross multiply
    681.47x = 1,393.45 × 1,393.45
  4. Step 4: Simplify right side
    681.47x = 1,941,711.61
  5. Step 5: Solve for x
    x = 1,941,711.61/681.47
  6. Step 6: Final answer
    x = 2,849.30

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.