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Finding the Third Proportional to 3,311 and 3,815

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Solution

The third proportional to 3,311 and 3,815 is: 4,395.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,311 : 3,815 = 3,815 : x
  2. Step 2: Convert to fraction form
    3,311/3,815 = 3,815/x
  3. Step 3: Cross multiply
    3,311x = 3,815 × 3,815
  4. Step 4: Simplify right side
    3,311x = 14,554,225
  5. Step 5: Solve for x
    x = 14,554,225/3,311
  6. Step 6: Final answer
    x = 4,395.72

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.