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Finding the Fourth Proportional to 199,520.40, 298,891.80 and 120,399.60

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Solution

The fourth proportional to 199,520.40, 298,891.80 and 120,399.60 is: 180,364.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,520.40 : 298,891.80 = 120,399.60 : x
  2. Step 2: Convert to fraction form
    199,520.40/298,891.80 = 120,399.60/x
  3. Step 3: Cross multiply
    199,520.40x = 298,891.80 × 120,399.60
  4. Step 4: Simplify right side
    199,520.40x = 35,986,453,163.28
  5. Step 5: Solve for x
    x = 35,986,453,163.28/199,520.40
  6. Step 6: Final answer
    x = 180,364.78

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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.