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Finding the Fourth Proportional to 358.05, 493.78 and 226.83

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Solution

The fourth proportional to 358.05, 493.78 and 226.83 is: 312.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.05 : 493.78 = 226.83 : x
  2. Step 2: Convert to fraction form
    358.05/493.78 = 226.83/x
  3. Step 3: Cross multiply
    358.05x = 493.78 × 226.83
  4. Step 4: Simplify right side
    358.05x = 112,004.12
  5. Step 5: Solve for x
    x = 112,004.12/358.05
  6. Step 6: Final answer
    x = 312.82

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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.