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Finding the Fourth Proportional to 2,399.60, 3,600.30 and 939.80

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Solution

The fourth proportional to 2,399.60, 3,600.30 and 939.80 is: 1,410.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,399.60 : 3,600.30 = 939.80 : x
  2. Step 2: Convert to fraction form
    2,399.60/3,600.30 = 939.80/x
  3. Step 3: Cross multiply
    2,399.60x = 3,600.30 × 939.80
  4. Step 4: Simplify right side
    2,399.60x = 3,383,561.94
  5. Step 5: Solve for x
    x = 3,383,561.94/2,399.60
  6. Step 6: Final answer
    x = 1,410.05

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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.