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Finding the Fourth Proportional to 539,408.40, 809,112.60 and 434,432.40

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Solution

The fourth proportional to 539,408.40, 809,112.60 and 434,432.40 is: 651,648.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,408.40 : 809,112.60 = 434,432.40 : x
  2. Step 2: Convert to fraction form
    539,408.40/809,112.60 = 434,432.40/x
  3. Step 3: Cross multiply
    539,408.40x = 809,112.60 × 434,432.40
  4. Step 4: Simplify right side
    539,408.40x = 351,504,728,688.24
  5. Step 5: Solve for x
    x = 351,504,728,688.24/539,408.40
  6. Step 6: Final answer
    x = 651,648.60

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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.