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Finding the Fourth Proportional to 2,940.70, 4,408.74 and 2,013.45

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Solution

The fourth proportional to 2,940.70, 4,408.74 and 2,013.45 is: 3,018.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,940.70 : 4,408.74 = 2,013.45 : x
  2. Step 2: Convert to fraction form
    2,940.70/4,408.74 = 2,013.45/x
  3. Step 3: Cross multiply
    2,940.70x = 4,408.74 × 2,013.45
  4. Step 4: Simplify right side
    2,940.70x = 8,876,745.44
  5. Step 5: Solve for x
    x = 8,876,745.44/2,940.70
  6. Step 6: Final answer
    x = 3,018.58

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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.