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Finding the Fourth Proportional to 311,919.60, 467,879.40 and 279,260.40

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Solution

The fourth proportional to 311,919.60, 467,879.40 and 279,260.40 is: 418,890.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,919.60 : 467,879.40 = 279,260.40 : x
  2. Step 2: Convert to fraction form
    311,919.60/467,879.40 = 279,260.40/x
  3. Step 3: Cross multiply
    311,919.60x = 467,879.40 × 279,260.40
  4. Step 4: Simplify right side
    311,919.60x = 130,660,188,395.76
  5. Step 5: Solve for x
    x = 130,660,188,395.76/311,919.60
  6. Step 6: Final answer
    x = 418,890.60

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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.