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Finding the Fourth Proportional to 550.82, 825.54 and 394.41

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Solution

The fourth proportional to 550.82, 825.54 and 394.41 is: 591.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.82 : 825.54 = 394.41 : x
  2. Step 2: Convert to fraction form
    550.82/825.54 = 394.41/x
  3. Step 3: Cross multiply
    550.82x = 825.54 × 394.41
  4. Step 4: Simplify right side
    550.82x = 325,601.23
  5. Step 5: Solve for x
    x = 325,601.23/550.82
  6. Step 6: Final answer
    x = 591.12

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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.