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Finding the Third Proportional to 2,007 and 3,116

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Solution

The third proportional to 2,007 and 3,116 is: 4,837.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,007 : 3,116 = 3,116 : x
  2. Step 2: Convert to fraction form
    2,007/3,116 = 3,116/x
  3. Step 3: Cross multiply
    2,007x = 3,116 × 3,116
  4. Step 4: Simplify right side
    2,007x = 9,709,456
  5. Step 5: Solve for x
    x = 9,709,456/2,007
  6. Step 6: Final answer
    x = 4,837.80

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.