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Finding the Third Proportional to 681.50 and 1,079.75

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Solution

The third proportional to 681.50 and 1,079.75 is: 1,710.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.50 : 1,079.75 = 1,079.75 : x
  2. Step 2: Convert to fraction form
    681.50/1,079.75 = 1,079.75/x
  3. Step 3: Cross multiply
    681.50x = 1,079.75 × 1,079.75
  4. Step 4: Simplify right side
    681.50x = 1,165,860.06
  5. Step 5: Solve for x
    x = 1,165,860.06/681.50
  6. Step 6: Final answer
    x = 1,710.73

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.