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Finding the Fourth Proportional to 401.31, 553.82 and 270.09

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Solution

The fourth proportional to 401.31, 553.82 and 270.09 is: 372.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.31 : 553.82 = 270.09 : x
  2. Step 2: Convert to fraction form
    401.31/553.82 = 270.09/x
  3. Step 3: Cross multiply
    401.31x = 553.82 × 270.09
  4. Step 4: Simplify right side
    401.31x = 149,579.89
  5. Step 5: Solve for x
    x = 149,579.89/401.31
  6. Step 6: Final answer
    x = 372.73

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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.