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Finding the Fourth Proportional to 358.05, 493.96 and 218.11

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Solution

The fourth proportional to 358.05, 493.96 and 218.11 is: 300.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.05 : 493.96 = 218.11 : x
  2. Step 2: Convert to fraction form
    358.05/493.96 = 218.11/x
  3. Step 3: Cross multiply
    358.05x = 493.96 × 218.11
  4. Step 4: Simplify right side
    358.05x = 107,738.52
  5. Step 5: Solve for x
    x = 107,738.52/358.05
  6. Step 6: Final answer
    x = 300.91

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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.