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Finding the Fourth Proportional to 398,137.20, 597,205.80 and 367,724.40

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Solution

The fourth proportional to 398,137.20, 597,205.80 and 367,724.40 is: 551,586.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,137.20 : 597,205.80 = 367,724.40 : x
  2. Step 2: Convert to fraction form
    398,137.20/597,205.80 = 367,724.40/x
  3. Step 3: Cross multiply
    398,137.20x = 597,205.80 × 367,724.40
  4. Step 4: Simplify right side
    398,137.20x = 219,607,144,481.52
  5. Step 5: Solve for x
    x = 219,607,144,481.52/398,137.20
  6. Step 6: Final answer
    x = 551,586.60

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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.