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Finding the Fourth Proportional to 619,937.40, 929,906.10 and 221,028.60

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Solution

The fourth proportional to 619,937.40, 929,906.10 and 221,028.60 is: 331,542.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,937.40 : 929,906.10 = 221,028.60 : x
  2. Step 2: Convert to fraction form
    619,937.40/929,906.10 = 221,028.60/x
  3. Step 3: Cross multiply
    619,937.40x = 929,906.10 × 221,028.60
  4. Step 4: Simplify right side
    619,937.40x = 205,535,843,414.46
  5. Step 5: Solve for x
    x = 205,535,843,414.46/619,937.40
  6. Step 6: Final answer
    x = 331,542.90

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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.