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Finding the Fourth Proportional to 2,399.40, 3,599.80 and 839.54

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Solution

The fourth proportional to 2,399.40, 3,599.80 and 839.54 is: 1,259.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,399.40 : 3,599.80 = 839.54 : x
  2. Step 2: Convert to fraction form
    2,399.40/3,599.80 = 839.54/x
  3. Step 3: Cross multiply
    2,399.40x = 3,599.80 × 839.54
  4. Step 4: Simplify right side
    2,399.40x = 3,022,176.09
  5. Step 5: Solve for x
    x = 3,022,176.09/2,399.40
  6. Step 6: Final answer
    x = 1,259.55

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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.