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Finding the Fourth Proportional to 619,375.11, 928,435.26 and 419,715.68

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Solution

The fourth proportional to 619,375.11, 928,435.26 and 419,715.68 is: 629,148.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,375.11 : 928,435.26 = 419,715.68 : x
  2. Step 2: Convert to fraction form
    619,375.11/928,435.26 = 419,715.68/x
  3. Step 3: Cross multiply
    619,375.11x = 928,435.26 × 419,715.68
  4. Step 4: Simplify right side
    619,375.11x = 389,678,833,418.63
  5. Step 5: Solve for x
    x = 389,678,833,418.63/619,375.11
  6. Step 6: Final answer
    x = 629,148.36

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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.