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Finding the Fourth Proportional to 543,816.40, 815,724.60 and 188,793.40

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Solution

The fourth proportional to 543,816.40, 815,724.60 and 188,793.40 is: 283,190.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,816.40 : 815,724.60 = 188,793.40 : x
  2. Step 2: Convert to fraction form
    543,816.40/815,724.60 = 188,793.40/x
  3. Step 3: Cross multiply
    543,816.40x = 815,724.60 × 188,793.40
  4. Step 4: Simplify right side
    543,816.40x = 154,003,420,697.64
  5. Step 5: Solve for x
    x = 154,003,420,697.64/543,816.40
  6. Step 6: Final answer
    x = 283,190.10

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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.