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Finding the Fourth Proportional to 3,938.80, 5,908.20 and 3,452.80

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Solution

The fourth proportional to 3,938.80, 5,908.20 and 3,452.80 is: 5,179.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.80 : 5,908.20 = 3,452.80 : x
  2. Step 2: Convert to fraction form
    3,938.80/5,908.20 = 3,452.80/x
  3. Step 3: Cross multiply
    3,938.80x = 5,908.20 × 3,452.80
  4. Step 4: Simplify right side
    3,938.80x = 20,399,832.96
  5. Step 5: Solve for x
    x = 20,399,832.96/3,938.80
  6. Step 6: Final answer
    x = 5,179.20

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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.