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Finding the Fourth Proportional to 401.29, 553.79 and 226.63

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Solution

The fourth proportional to 401.29, 553.79 and 226.63 is: 312.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.29 : 553.79 = 226.63 : x
  2. Step 2: Convert to fraction form
    401.29/553.79 = 226.63/x
  3. Step 3: Cross multiply
    401.29x = 553.79 × 226.63
  4. Step 4: Simplify right side
    401.29x = 125,505.43
  5. Step 5: Solve for x
    x = 125,505.43/401.29
  6. Step 6: Final answer
    x = 312.75

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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.