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Finding the Fourth Proportional to 358.38, 494.58 and 203.12

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Solution

The fourth proportional to 358.38, 494.58 and 203.12 is: 280.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.38 : 494.58 = 203.12 : x
  2. Step 2: Convert to fraction form
    358.38/494.58 = 203.12/x
  3. Step 3: Cross multiply
    358.38x = 494.58 × 203.12
  4. Step 4: Simplify right side
    358.38x = 100,459.09
  5. Step 5: Solve for x
    x = 100,459.09/358.38
  6. Step 6: Final answer
    x = 280.31

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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.