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Finding the Fourth Proportional to 3,388.78, 5,108.57 and 3,163

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Solution

The fourth proportional to 3,388.78, 5,108.57 and 3,163 is: 4,768.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,388.78 : 5,108.57 = 3,163 : x
  2. Step 2: Convert to fraction form
    3,388.78/5,108.57 = 3,163/x
  3. Step 3: Cross multiply
    3,388.78x = 5,108.57 × 3,163
  4. Step 4: Simplify right side
    3,388.78x = 16,158,406.91
  5. Step 5: Solve for x
    x = 16,158,406.91/3,388.78
  6. Step 6: Final answer
    x = 4,768.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.