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Finding the Third Proportional to 767 and 2,078

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Solution

The third proportional to 767 and 2,078 is: 5,629.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    767 : 2,078 = 2,078 : x
  2. Step 2: Convert to fraction form
    767/2,078 = 2,078/x
  3. Step 3: Cross multiply
    767x = 2,078 × 2,078
  4. Step 4: Simplify right side
    767x = 4,318,084
  5. Step 5: Solve for x
    x = 4,318,084/767
  6. Step 6: Final answer
    x = 5,629.84

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Why These Related Problems?

These problems maintain the same ratio (2.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.