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Finding the Third Proportional to 974 and 1,112

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Solution

The third proportional to 974 and 1,112 is: 1,269.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    974 : 1,112 = 1,112 : x
  2. Step 2: Convert to fraction form
    974/1,112 = 1,112/x
  3. Step 3: Cross multiply
    974x = 1,112 × 1,112
  4. Step 4: Simplify right side
    974x = 1,236,544
  5. Step 5: Solve for x
    x = 1,236,544/974
  6. Step 6: Final answer
    x = 1,269.55

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.