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Finding the Fourth Proportional to 411,960.21, 618,028.49 and 127,644.44

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Solution

The fourth proportional to 411,960.21, 618,028.49 and 127,644.44 is: 191,493.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,960.21 : 618,028.49 = 127,644.44 : x
  2. Step 2: Convert to fraction form
    411,960.21/618,028.49 = 127,644.44/x
  3. Step 3: Cross multiply
    411,960.21x = 618,028.49 × 127,644.44
  4. Step 4: Simplify right side
    411,960.21x = 78,887,896,781.73
  5. Step 5: Solve for x
    x = 78,887,896,781.73/411,960.21
  6. Step 6: Final answer
    x = 191,493.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.