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Finding the Fourth Proportional to 405,270.20, 607,249.20 and 381,650.60

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Solution

The fourth proportional to 405,270.20, 607,249.20 and 381,650.60 is: 571,858.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,270.20 : 607,249.20 = 381,650.60 : x
  2. Step 2: Convert to fraction form
    405,270.20/607,249.20 = 381,650.60/x
  3. Step 3: Cross multiply
    405,270.20x = 607,249.20 × 381,650.60
  4. Step 4: Simplify right side
    405,270.20x = 231,757,021,529.52
  5. Step 5: Solve for x
    x = 231,757,021,529.52/405,270.20
  6. Step 6: Final answer
    x = 571,858.04

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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.