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Finding the Fourth Proportional to 3,321.99, 4,979.79 and 1,241.42

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Solution

The fourth proportional to 3,321.99, 4,979.79 and 1,241.42 is: 1,860.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,321.99 : 4,979.79 = 1,241.42 : x
  2. Step 2: Convert to fraction form
    3,321.99/4,979.79 = 1,241.42/x
  3. Step 3: Cross multiply
    3,321.99x = 4,979.79 × 1,241.42
  4. Step 4: Simplify right side
    3,321.99x = 6,181,986.00
  5. Step 5: Solve for x
    x = 6,181,986.00/3,321.99
  6. Step 6: Final answer
    x = 1,860.93

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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.