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Finding the Third Proportional to 681.75 and 1,352.81

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Solution

The third proportional to 681.75 and 1,352.81 is: 2,684.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.75 : 1,352.81 = 1,352.81 : x
  2. Step 2: Convert to fraction form
    681.75/1,352.81 = 1,352.81/x
  3. Step 3: Cross multiply
    681.75x = 1,352.81 × 1,352.81
  4. Step 4: Simplify right side
    681.75x = 1,830,101.66
  5. Step 5: Solve for x
    x = 1,830,101.66/681.75
  6. Step 6: Final answer
    x = 2,684.42

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Why These Related Problems?

These problems maintain the same ratio (1.98) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.