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Finding the Fourth Proportional to 278,843.96, 417,171.04 and 215,183.12

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Solution

The fourth proportional to 278,843.96, 417,171.04 and 215,183.12 is: 321,929.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,843.96 : 417,171.04 = 215,183.12 : x
  2. Step 2: Convert to fraction form
    278,843.96/417,171.04 = 215,183.12/x
  3. Step 3: Cross multiply
    278,843.96x = 417,171.04 × 215,183.12
  4. Step 4: Simplify right side
    278,843.96x = 89,768,165,960.84
  5. Step 5: Solve for x
    x = 89,768,165,960.84/278,843.96
  6. Step 6: Final answer
    x = 321,929.75

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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.