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Finding the Fourth Proportional to 2,408.21, 3,611.50 and 676.43

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Solution

The fourth proportional to 2,408.21, 3,611.50 and 676.43 is: 1,014.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,408.21 : 3,611.50 = 676.43 : x
  2. Step 2: Convert to fraction form
    2,408.21/3,611.50 = 676.43/x
  3. Step 3: Cross multiply
    2,408.21x = 3,611.50 × 676.43
  4. Step 4: Simplify right side
    2,408.21x = 2,442,926.95
  5. Step 5: Solve for x
    x = 2,442,926.95/2,408.21
  6. Step 6: Final answer
    x = 1,014.42

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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.