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Finding the Fourth Proportional to 2,578.43, 3,867.92 and 847.19

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Solution

The fourth proportional to 2,578.43, 3,867.92 and 847.19 is: 1,270.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,578.43 : 3,867.92 = 847.19 : x
  2. Step 2: Convert to fraction form
    2,578.43/3,867.92 = 847.19/x
  3. Step 3: Cross multiply
    2,578.43x = 3,867.92 × 847.19
  4. Step 4: Simplify right side
    2,578.43x = 3,276,863.14
  5. Step 5: Solve for x
    x = 3,276,863.14/2,578.43
  6. Step 6: Final answer
    x = 1,270.88

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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.