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Finding the Fourth Proportional to 638,793.75, 958,190.63 and 259,625.65

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Solution

The fourth proportional to 638,793.75, 958,190.63 and 259,625.65 is: 389,438.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,793.75 : 958,190.63 = 259,625.65 : x
  2. Step 2: Convert to fraction form
    638,793.75/958,190.63 = 259,625.65/x
  3. Step 3: Cross multiply
    638,793.75x = 958,190.63 × 259,625.65
  4. Step 4: Simplify right side
    638,793.75x = 248,770,865,137.66
  5. Step 5: Solve for x
    x = 248,770,865,137.66/638,793.75
  6. Step 6: Final answer
    x = 389,438.48

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Double scale
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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.