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Finding the Fourth Proportional to 3,399.87, 4,691.88 and 1,984.39

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Solution

The fourth proportional to 3,399.87, 4,691.88 and 1,984.39 is: 2,738.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,399.87 : 4,691.88 = 1,984.39 : x
  2. Step 2: Convert to fraction form
    3,399.87/4,691.88 = 1,984.39/x
  3. Step 3: Cross multiply
    3,399.87x = 4,691.88 × 1,984.39
  4. Step 4: Simplify right side
    3,399.87x = 9,310,519.75
  5. Step 5: Solve for x
    x = 9,310,519.75/3,399.87
  6. Step 6: Final answer
    x = 2,738.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.