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Finding the Third Proportional to 826 and 2,170

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Solution

The third proportional to 826 and 2,170 is: 5,700.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    826 : 2,170 = 2,170 : x
  2. Step 2: Convert to fraction form
    826/2,170 = 2,170/x
  3. Step 3: Cross multiply
    826x = 2,170 × 2,170
  4. Step 4: Simplify right side
    826x = 4,708,900
  5. Step 5: Solve for x
    x = 4,708,900/826
  6. Step 6: Final answer
    x = 5,700.85

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Why These Related Problems?

These problems maintain the same ratio (2.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.