Home / 2,151.20-3,221.97-1,869.95

Finding the Fourth Proportional to 2,151.20, 3,221.97 and 1,869.95

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Solution

The fourth proportional to 2,151.20, 3,221.97 and 1,869.95 is: 2,800.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.20 : 3,221.97 = 1,869.95 : x
  2. Step 2: Convert to fraction form
    2,151.20/3,221.97 = 1,869.95/x
  3. Step 3: Cross multiply
    2,151.20x = 3,221.97 × 1,869.95
  4. Step 4: Simplify right side
    2,151.20x = 6,024,906.69
  5. Step 5: Solve for x
    x = 6,024,906.69/2,151.20
  6. Step 6: Final answer
    x = 2,800.73

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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.