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Finding the Third Proportional to 2,150 and 2,815

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Solution

The third proportional to 2,150 and 2,815 is: 3,685.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,150 : 2,815 = 2,815 : x
  2. Step 2: Convert to fraction form
    2,150/2,815 = 2,815/x
  3. Step 3: Cross multiply
    2,150x = 2,815 × 2,815
  4. Step 4: Simplify right side
    2,150x = 7,924,225
  5. Step 5: Solve for x
    x = 7,924,225/2,150
  6. Step 6: Final answer
    x = 3,685.69

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.