Home / 820,078.67-1,229,977.79-220,899.70

Finding the Fourth Proportional to 820,078.67, 1,229,977.79 and 220,899.70

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Solution

The fourth proportional to 820,078.67, 1,229,977.79 and 220,899.70 is: 331,311.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,078.67 : 1,229,977.79 = 220,899.70 : x
  2. Step 2: Convert to fraction form
    820,078.67/1,229,977.79 = 220,899.70/x
  3. Step 3: Cross multiply
    820,078.67x = 1,229,977.79 × 220,899.70
  4. Step 4: Simplify right side
    820,078.67x = 271,701,718,667.77
  5. Step 5: Solve for x
    x = 271,701,718,667.77/820,078.67
  6. Step 6: Final answer
    x = 331,311.78

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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.