Home / 809,321.60-1,213,982.40-388,380.80

Finding the Fourth Proportional to 809,321.60, 1,213,982.40 and 388,380.80

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Solution

The fourth proportional to 809,321.60, 1,213,982.40 and 388,380.80 is: 582,571.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,321.60 : 1,213,982.40 = 388,380.80 : x
  2. Step 2: Convert to fraction form
    809,321.60/1,213,982.40 = 388,380.80/x
  3. Step 3: Cross multiply
    809,321.60x = 1,213,982.40 × 388,380.80
  4. Step 4: Simplify right side
    809,321.60x = 471,487,455,697.92
  5. Step 5: Solve for x
    x = 471,487,455,697.92/809,321.60
  6. Step 6: Final answer
    x = 582,571.20

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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.