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Finding the Third Proportional to 917 and 2,176

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Solution

The third proportional to 917 and 2,176 is: 5,163.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    917 : 2,176 = 2,176 : x
  2. Step 2: Convert to fraction form
    917/2,176 = 2,176/x
  3. Step 3: Cross multiply
    917x = 2,176 × 2,176
  4. Step 4: Simplify right side
    917x = 4,734,976
  5. Step 5: Solve for x
    x = 4,734,976/917
  6. Step 6: Final answer
    x = 5,163.55

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Why These Related Problems?

These problems maintain the same ratio (2.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.