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Finding the Fourth Proportional to 4,939.79, 7,400.36 and 3,838.79

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Solution

The fourth proportional to 4,939.79, 7,400.36 and 3,838.79 is: 5,750.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,939.79 : 7,400.36 = 3,838.79 : x
  2. Step 2: Convert to fraction form
    4,939.79/7,400.36 = 3,838.79/x
  3. Step 3: Cross multiply
    4,939.79x = 7,400.36 × 3,838.79
  4. Step 4: Simplify right side
    4,939.79x = 28,408,456.06
  5. Step 5: Solve for x
    x = 28,408,456.06/4,939.79
  6. Step 6: Final answer
    x = 5,750.95

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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.