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Finding the Fourth Proportional to 358.28, 494.38 and 203

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Solution

The fourth proportional to 358.28, 494.38 and 203 is: 280.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.28 : 494.38 = 203 : x
  2. Step 2: Convert to fraction form
    358.28/494.38 = 203/x
  3. Step 3: Cross multiply
    358.28x = 494.38 × 203
  4. Step 4: Simplify right side
    358.28x = 100,359.14
  5. Step 5: Solve for x
    x = 100,359.14/358.28
  6. Step 6: Final answer
    x = 280.11

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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.