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Finding the Fourth Proportional to 4,938.39, 7,408.79 and 3,480.39

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Solution

The fourth proportional to 4,938.39, 7,408.79 and 3,480.39 is: 5,221.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,938.39 : 7,408.79 = 3,480.39 : x
  2. Step 2: Convert to fraction form
    4,938.39/7,408.79 = 3,480.39/x
  3. Step 3: Cross multiply
    4,938.39x = 7,408.79 × 3,480.39
  4. Step 4: Simplify right side
    4,938.39x = 25,785,474.28
  5. Step 5: Solve for x
    x = 25,785,474.28/4,938.39
  6. Step 6: Final answer
    x = 5,221.43

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1.5x scale

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.