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Finding the Fourth Proportional to 619,404.89, 928,479.85 and 419,745.47

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Solution

The fourth proportional to 619,404.89, 928,479.85 and 419,745.47 is: 629,192.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,404.89 : 928,479.85 = 419,745.47 : x
  2. Step 2: Convert to fraction form
    619,404.89/928,479.85 = 419,745.47/x
  3. Step 3: Cross multiply
    619,404.89x = 928,479.85 × 419,745.47
  4. Step 4: Simplify right side
    619,404.89x = 389,725,211,023.78
  5. Step 5: Solve for x
    x = 389,725,211,023.78/619,404.89
  6. Step 6: Final answer
    x = 629,192.98

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1.5x scale

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.