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Finding the Third Proportional to 1,768 and 3,112

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Solution

The third proportional to 1,768 and 3,112 is: 5,477.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,768 : 3,112 = 3,112 : x
  2. Step 2: Convert to fraction form
    1,768/3,112 = 3,112/x
  3. Step 3: Cross multiply
    1,768x = 3,112 × 3,112
  4. Step 4: Simplify right side
    1,768x = 9,684,544
  5. Step 5: Solve for x
    x = 9,684,544/1,768
  6. Step 6: Final answer
    x = 5,477.68

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Why These Related Problems?

These problems maintain the same ratio (1.76) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.