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Finding the Fourth Proportional to 550.09, 757.55 and 439.22

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Solution

The fourth proportional to 550.09, 757.55 and 439.22 is: 604.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.09 : 757.55 = 439.22 : x
  2. Step 2: Convert to fraction form
    550.09/757.55 = 439.22/x
  3. Step 3: Cross multiply
    550.09x = 757.55 × 439.22
  4. Step 4: Simplify right side
    550.09x = 332,734.10
  5. Step 5: Solve for x
    x = 332,734.10/550.09
  6. Step 6: Final answer
    x = 604.87

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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.