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Finding the Third Proportional to 771 and 1,642.88

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Solution

The third proportional to 771 and 1,642.88 is: 3,500.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    771 : 1,642.88 = 1,642.88 : x
  2. Step 2: Convert to fraction form
    771/1,642.88 = 1,642.88/x
  3. Step 3: Cross multiply
    771x = 1,642.88 × 1,642.88
  4. Step 4: Simplify right side
    771x = 2,699,038.27
  5. Step 5: Solve for x
    x = 2,699,038.27/771
  6. Step 6: Final answer
    x = 3,500.70

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.