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Finding the Fourth Proportional to 2,123.43, 3,183.95 and 873.68

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Solution

The fourth proportional to 2,123.43, 3,183.95 and 873.68 is: 1,310.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,123.43 : 3,183.95 = 873.68 : x
  2. Step 2: Convert to fraction form
    2,123.43/3,183.95 = 873.68/x
  3. Step 3: Cross multiply
    2,123.43x = 3,183.95 × 873.68
  4. Step 4: Simplify right side
    2,123.43x = 2,781,733.15
  5. Step 5: Solve for x
    x = 2,781,733.15/2,123.43
  6. Step 6: Final answer
    x = 1,310.02

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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.