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Finding the Fourth Proportional to 401.39, 553.92 and 226.74

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Solution

The fourth proportional to 401.39, 553.92 and 226.74 is: 312.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.39 : 553.92 = 226.74 : x
  2. Step 2: Convert to fraction form
    401.39/553.92 = 226.74/x
  3. Step 3: Cross multiply
    401.39x = 553.92 × 226.74
  4. Step 4: Simplify right side
    401.39x = 125,593.05
  5. Step 5: Solve for x
    x = 125,593.05/401.39
  6. Step 6: Final answer
    x = 312.90

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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.