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Finding the Fourth Proportional to 2,679.12, 4,015.26 and 2,331

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Solution

The fourth proportional to 2,679.12, 4,015.26 and 2,331 is: 3,493.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.12 : 4,015.26 = 2,331 : x
  2. Step 2: Convert to fraction form
    2,679.12/4,015.26 = 2,331/x
  3. Step 3: Cross multiply
    2,679.12x = 4,015.26 × 2,331
  4. Step 4: Simplify right side
    2,679.12x = 9,359,571.06
  5. Step 5: Solve for x
    x = 9,359,571.06/2,679.12
  6. Step 6: Final answer
    x = 3,493.52

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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.