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Finding the Fourth Proportional to 539,632.80, 809,449.20 and 451,715.40

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Solution

The fourth proportional to 539,632.80, 809,449.20 and 451,715.40 is: 677,573.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,632.80 : 809,449.20 = 451,715.40 : x
  2. Step 2: Convert to fraction form
    539,632.80/809,449.20 = 451,715.40/x
  3. Step 3: Cross multiply
    539,632.80x = 809,449.20 × 451,715.40
  4. Step 4: Simplify right side
    539,632.80x = 365,640,669,157.68
  5. Step 5: Solve for x
    x = 365,640,669,157.68/539,632.80
  6. Step 6: Final answer
    x = 677,573.10

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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.