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Finding the Fourth Proportional to 619,396.14, 928,466.73 and 419,736.72

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Solution

The fourth proportional to 619,396.14, 928,466.73 and 419,736.72 is: 629,179.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,396.14 : 928,466.73 = 419,736.72 : x
  2. Step 2: Convert to fraction form
    619,396.14/928,466.73 = 419,736.72/x
  3. Step 3: Cross multiply
    619,396.14x = 928,466.73 × 419,736.72
  4. Step 4: Simplify right side
    619,396.14x = 389,711,579,879.33
  5. Step 5: Solve for x
    x = 389,711,579,879.33/619,396.14
  6. Step 6: Final answer
    x = 629,179.87

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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.