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Finding the Fourth Proportional to 2,574.43, 3,861.92 and 843.19

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Solution

The fourth proportional to 2,574.43, 3,861.92 and 843.19 is: 1,264.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,574.43 : 3,861.92 = 843.19 : x
  2. Step 2: Convert to fraction form
    2,574.43/3,861.92 = 843.19/x
  3. Step 3: Cross multiply
    2,574.43x = 3,861.92 × 843.19
  4. Step 4: Simplify right side
    2,574.43x = 3,256,328.11
  5. Step 5: Solve for x
    x = 3,256,328.11/2,574.43
  6. Step 6: Final answer
    x = 1,264.87

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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.