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Finding the Fourth Proportional to 1,581.91, 2,183.09 and 873.78

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Solution

The fourth proportional to 1,581.91, 2,183.09 and 873.78 is: 1,205.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.91 : 2,183.09 = 873.78 : x
  2. Step 2: Convert to fraction form
    1,581.91/2,183.09 = 873.78/x
  3. Step 3: Cross multiply
    1,581.91x = 2,183.09 × 873.78
  4. Step 4: Simplify right side
    1,581.91x = 1,907,540.38
  5. Step 5: Solve for x
    x = 1,907,540.38/1,581.91
  6. Step 6: Final answer
    x = 1,205.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.