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Finding the Fourth Proportional to 539,389.60, 809,278.80 and 519,949.60

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Solution

The fourth proportional to 539,389.60, 809,278.80 and 519,949.60 is: 780,111.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,389.60 : 809,278.80 = 519,949.60 : x
  2. Step 2: Convert to fraction form
    539,389.60/809,278.80 = 519,949.60/x
  3. Step 3: Cross multiply
    539,389.60x = 809,278.80 × 519,949.60
  4. Step 4: Simplify right side
    539,389.60x = 420,784,188,348.48
  5. Step 5: Solve for x
    x = 420,784,188,348.48/539,389.60
  6. Step 6: Final answer
    x = 780,111.79

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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.