Home / 2,152.78-3,229.20-691.96

Finding the Fourth Proportional to 2,152.78, 3,229.20 and 691.96

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Solution

The fourth proportional to 2,152.78, 3,229.20 and 691.96 is: 1,037.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,152.78 : 3,229.20 = 691.96 : x
  2. Step 2: Convert to fraction form
    2,152.78/3,229.20 = 691.96/x
  3. Step 3: Cross multiply
    2,152.78x = 3,229.20 × 691.96
  4. Step 4: Simplify right side
    2,152.78x = 2,234,477.23
  5. Step 5: Solve for x
    x = 2,234,477.23/2,152.78
  6. Step 6: Final answer
    x = 1,037.95

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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.