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Finding the Third Proportional to 792 and 1,911

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Solution

The third proportional to 792 and 1,911 is: 4,611.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    792 : 1,911 = 1,911 : x
  2. Step 2: Convert to fraction form
    792/1,911 = 1,911/x
  3. Step 3: Cross multiply
    792x = 1,911 × 1,911
  4. Step 4: Simplify right side
    792x = 3,651,921
  5. Step 5: Solve for x
    x = 3,651,921/792
  6. Step 6: Final answer
    x = 4,611.01

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Why These Related Problems?

These problems maintain the same ratio (2.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.