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Finding the Third Proportional to 2,689 and 3,808

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Solution

The third proportional to 2,689 and 3,808 is: 5,392.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689 : 3,808 = 3,808 : x
  2. Step 2: Convert to fraction form
    2,689/3,808 = 3,808/x
  3. Step 3: Cross multiply
    2,689x = 3,808 × 3,808
  4. Step 4: Simplify right side
    2,689x = 14,500,864
  5. Step 5: Solve for x
    x = 14,500,864/2,689
  6. Step 6: Final answer
    x = 5,392.66

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.