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Finding the Third Proportional to 3,116 and 5,079

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Solution

The third proportional to 3,116 and 5,079 is: 8,278.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,116 : 5,079 = 5,079 : x
  2. Step 2: Convert to fraction form
    3,116/5,079 = 5,079/x
  3. Step 3: Cross multiply
    3,116x = 5,079 × 5,079
  4. Step 4: Simplify right side
    3,116x = 25,796,241
  5. Step 5: Solve for x
    x = 25,796,241/3,116
  6. Step 6: Final answer
    x = 8,278.64

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.