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Finding the Fourth Proportional to 401.32, 553.81 and 226.66

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Solution

The fourth proportional to 401.32, 553.81 and 226.66 is: 312.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.32 : 553.81 = 226.66 : x
  2. Step 2: Convert to fraction form
    401.32/553.81 = 226.66/x
  3. Step 3: Cross multiply
    401.32x = 553.81 × 226.66
  4. Step 4: Simplify right side
    401.32x = 125,526.57
  5. Step 5: Solve for x
    x = 125,526.57/401.32
  6. Step 6: Final answer
    x = 312.78

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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.