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Finding the Fourth Proportional to 401.28, 550.38 and 371.04

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Solution

The fourth proportional to 401.28, 550.38 and 371.04 is: 508.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.28 : 550.38 = 371.04 : x
  2. Step 2: Convert to fraction form
    401.28/550.38 = 371.04/x
  3. Step 3: Cross multiply
    401.28x = 550.38 × 371.04
  4. Step 4: Simplify right side
    401.28x = 204,213.00
  5. Step 5: Solve for x
    x = 204,213.00/401.28
  6. Step 6: Final answer
    x = 508.90

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.