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Finding the Fourth Proportional to 605,147.20, 907,720.80 and 416,190.40

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Solution

The fourth proportional to 605,147.20, 907,720.80 and 416,190.40 is: 624,285.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,147.20 : 907,720.80 = 416,190.40 : x
  2. Step 2: Convert to fraction form
    605,147.20/907,720.80 = 416,190.40/x
  3. Step 3: Cross multiply
    605,147.20x = 907,720.80 × 416,190.40
  4. Step 4: Simplify right side
    605,147.20x = 377,784,682,840.32
  5. Step 5: Solve for x
    x = 377,784,682,840.32/605,147.20
  6. Step 6: Final answer
    x = 624,285.60

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Similar ratio
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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.