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Finding the Fourth Proportional to 608,694.60, 840,179.40 and 393,829.20

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Solution

The fourth proportional to 608,694.60, 840,179.40 and 393,829.20 is: 543,601.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,694.60 : 840,179.40 = 393,829.20 : x
  2. Step 2: Convert to fraction form
    608,694.60/840,179.40 = 393,829.20/x
  3. Step 3: Cross multiply
    608,694.60x = 840,179.40 × 393,829.20
  4. Step 4: Simplify right side
    608,694.60x = 330,887,180,958.48
  5. Step 5: Solve for x
    x = 330,887,180,958.48/608,694.60
  6. Step 6: Final answer
    x = 543,601.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.