Home / 809,850.40-1,215,121.20-388,909.60

Finding the Fourth Proportional to 809,850.40, 1,215,121.20 and 388,909.60

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Solution

The fourth proportional to 809,850.40, 1,215,121.20 and 388,909.60 is: 583,530.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,850.40 : 1,215,121.20 = 388,909.60 : x
  2. Step 2: Convert to fraction form
    809,850.40/1,215,121.20 = 388,909.60/x
  3. Step 3: Cross multiply
    809,850.40x = 1,215,121.20 × 388,909.60
  4. Step 4: Simplify right side
    809,850.40x = 472,572,299,843.52
  5. Step 5: Solve for x
    x = 472,572,299,843.52/809,850.40
  6. Step 6: Final answer
    x = 583,530.37

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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.