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Finding the Fourth Proportional to 550.78, 825.41 and 203.78

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Solution

The fourth proportional to 550.78, 825.41 and 203.78 is: 305.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.78 : 825.41 = 203.78 : x
  2. Step 2: Convert to fraction form
    550.78/825.41 = 203.78/x
  3. Step 3: Cross multiply
    550.78x = 825.41 × 203.78
  4. Step 4: Simplify right side
    550.78x = 168,202.05
  5. Step 5: Solve for x
    x = 168,202.05/550.78
  6. Step 6: Final answer
    x = 305.39

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Double scale
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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.