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Finding the Fourth Proportional to 665,632.80, 998,449.20 and 628,891.20

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Solution

The fourth proportional to 665,632.80, 998,449.20 and 628,891.20 is: 943,336.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,632.80 : 998,449.20 = 628,891.20 : x
  2. Step 2: Convert to fraction form
    665,632.80/998,449.20 = 628,891.20/x
  3. Step 3: Cross multiply
    665,632.80x = 998,449.20 × 628,891.20
  4. Step 4: Simplify right side
    665,632.80x = 627,915,915,527.04
  5. Step 5: Solve for x
    x = 627,915,915,527.04/665,632.80
  6. Step 6: Final answer
    x = 943,336.80

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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.