Home / 809,712.40-1,214,914.20-388,771.60

Finding the Fourth Proportional to 809,712.40, 1,214,914.20 and 388,771.60

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Solution

The fourth proportional to 809,712.40, 1,214,914.20 and 388,771.60 is: 583,323.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,712.40 : 1,214,914.20 = 388,771.60 : x
  2. Step 2: Convert to fraction form
    809,712.40/1,214,914.20 = 388,771.60/x
  3. Step 3: Cross multiply
    809,712.40x = 1,214,914.20 × 388,771.60
  4. Step 4: Simplify right side
    809,712.40x = 472,324,137,396.72
  5. Step 5: Solve for x
    x = 472,324,137,396.72/809,712.40
  6. Step 6: Final answer
    x = 583,323.33

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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.