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Finding the Fourth Proportional to 891,806.60, 1,337,709.90 and 419,414.60

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Solution

The fourth proportional to 891,806.60, 1,337,709.90 and 419,414.60 is: 629,121.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,806.60 : 1,337,709.90 = 419,414.60 : x
  2. Step 2: Convert to fraction form
    891,806.60/1,337,709.90 = 419,414.60/x
  3. Step 3: Cross multiply
    891,806.60x = 1,337,709.90 × 419,414.60
  4. Step 4: Simplify right side
    891,806.60x = 561,055,062,624.54
  5. Step 5: Solve for x
    x = 561,055,062,624.54/891,806.60
  6. Step 6: Final answer
    x = 629,121.90

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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.