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Finding the Third Proportional to 3,812 and 5,278

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Solution

The third proportional to 3,812 and 5,278 is: 7,307.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,812 : 5,278 = 5,278 : x
  2. Step 2: Convert to fraction form
    3,812/5,278 = 5,278/x
  3. Step 3: Cross multiply
    3,812x = 5,278 × 5,278
  4. Step 4: Simplify right side
    3,812x = 27,857,284
  5. Step 5: Solve for x
    x = 27,857,284/3,812
  6. Step 6: Final answer
    x = 7,307.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.