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Finding the Third Proportional to 680.81 and 836.06

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Solution

The third proportional to 680.81 and 836.06 is: 1,026.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.81 : 836.06 = 836.06 : x
  2. Step 2: Convert to fraction form
    680.81/836.06 = 836.06/x
  3. Step 3: Cross multiply
    680.81x = 836.06 × 836.06
  4. Step 4: Simplify right side
    680.81x = 699,000.50
  5. Step 5: Solve for x
    x = 699,000.50/680.81
  6. Step 6: Final answer
    x = 1,026.72

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Why These Related Problems?

These problems maintain the same ratio (1.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.