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Finding the Third Proportional to 1,288 and 2,836

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Solution

The third proportional to 1,288 and 2,836 is: 6,244.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288 : 2,836 = 2,836 : x
  2. Step 2: Convert to fraction form
    1,288/2,836 = 2,836/x
  3. Step 3: Cross multiply
    1,288x = 2,836 × 2,836
  4. Step 4: Simplify right side
    1,288x = 8,042,896
  5. Step 5: Solve for x
    x = 8,042,896/1,288
  6. Step 6: Final answer
    x = 6,244.48

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.