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Finding the Third Proportional to 986.50 and 1,126

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Solution

The third proportional to 986.50 and 1,126 is: 1,285.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.50 : 1,126 = 1,126 : x
  2. Step 2: Convert to fraction form
    986.50/1,126 = 1,126/x
  3. Step 3: Cross multiply
    986.50x = 1,126 × 1,126
  4. Step 4: Simplify right side
    986.50x = 1,267,876
  5. Step 5: Solve for x
    x = 1,267,876/986.50
  6. Step 6: Final answer
    x = 1,285.23

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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.