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Finding the Fourth Proportional to 550.09, 759.92 and 439.42

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Solution

The fourth proportional to 550.09, 759.92 and 439.42 is: 607.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.09 : 759.92 = 439.42 : x
  2. Step 2: Convert to fraction form
    550.09/759.92 = 439.42/x
  3. Step 3: Cross multiply
    550.09x = 759.92 × 439.42
  4. Step 4: Simplify right side
    550.09x = 333,921.85
  5. Step 5: Solve for x
    x = 333,921.85/550.09
  6. Step 6: Final answer
    x = 607.03

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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.