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Finding the Fourth Proportional to 358.74, 494.94 and 209.38

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Solution

The fourth proportional to 358.74, 494.94 and 209.38 is: 288.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.74 : 494.94 = 209.38 : x
  2. Step 2: Convert to fraction form
    358.74/494.94 = 209.38/x
  3. Step 3: Cross multiply
    358.74x = 494.94 × 209.38
  4. Step 4: Simplify right side
    358.74x = 103,630.54
  5. Step 5: Solve for x
    x = 103,630.54/358.74
  6. Step 6: Final answer
    x = 288.87

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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.