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Finding the Fourth Proportional to 279,993.60, 419,990.40 and 80,296.20

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Solution

The fourth proportional to 279,993.60, 419,990.40 and 80,296.20 is: 120,444.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,993.60 : 419,990.40 = 80,296.20 : x
  2. Step 2: Convert to fraction form
    279,993.60/419,990.40 = 80,296.20/x
  3. Step 3: Cross multiply
    279,993.60x = 419,990.40 × 80,296.20
  4. Step 4: Simplify right side
    279,993.60x = 33,723,633,156.48
  5. Step 5: Solve for x
    x = 33,723,633,156.48/279,993.60
  6. Step 6: Final answer
    x = 120,444.30

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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.