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Finding the Fourth Proportional to 656,078.80, 984,118.20 and 419,688.40

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Solution

The fourth proportional to 656,078.80, 984,118.20 and 419,688.40 is: 629,532.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,078.80 : 984,118.20 = 419,688.40 : x
  2. Step 2: Convert to fraction form
    656,078.80/984,118.20 = 419,688.40/x
  3. Step 3: Cross multiply
    656,078.80x = 984,118.20 × 419,688.40
  4. Step 4: Simplify right side
    656,078.80x = 413,022,992,768.88
  5. Step 5: Solve for x
    x = 413,022,992,768.88/656,078.80
  6. Step 6: Final answer
    x = 629,532.60

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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.