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Finding the Fourth Proportional to 354.81, 490.38 and 271.92

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Solution

The fourth proportional to 354.81, 490.38 and 271.92 is: 375.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.81 : 490.38 = 271.92 : x
  2. Step 2: Convert to fraction form
    354.81/490.38 = 271.92/x
  3. Step 3: Cross multiply
    354.81x = 490.38 × 271.92
  4. Step 4: Simplify right side
    354.81x = 133,344.13
  5. Step 5: Solve for x
    x = 133,344.13/354.81
  6. Step 6: Final answer
    x = 375.82

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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.