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Finding the Fourth Proportional to 400.78, 552.99 and 226.09

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Solution

The fourth proportional to 400.78, 552.99 and 226.09 is: 311.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.78 : 552.99 = 226.09 : x
  2. Step 2: Convert to fraction form
    400.78/552.99 = 226.09/x
  3. Step 3: Cross multiply
    400.78x = 552.99 × 226.09
  4. Step 4: Simplify right side
    400.78x = 125,025.51
  5. Step 5: Solve for x
    x = 125,025.51/400.78
  6. Step 6: Final answer
    x = 311.96

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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.