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Finding the Third Proportional to 411,128 and 887,380

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Solution

The third proportional to 411,128 and 887,380 is: 1,915,323.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,128 : 887,380 = 887,380 : x
  2. Step 2: Convert to fraction form
    411,128/887,380 = 887,380/x
  3. Step 3: Cross multiply
    411,128x = 887,380 × 887,380
  4. Step 4: Simplify right side
    411,128x = 787,443,264,400
  5. Step 5: Solve for x
    x = 787,443,264,400/411,128
  6. Step 6: Final answer
    x = 1,915,323.85

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.