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Finding the Fourth Proportional to 342.69, 472.42 and 226.05

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Solution

The fourth proportional to 342.69, 472.42 and 226.05 is: 311.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.69 : 472.42 = 226.05 : x
  2. Step 2: Convert to fraction form
    342.69/472.42 = 226.05/x
  3. Step 3: Cross multiply
    342.69x = 472.42 × 226.05
  4. Step 4: Simplify right side
    342.69x = 106,790.54
  5. Step 5: Solve for x
    x = 106,790.54/342.69
  6. Step 6: Final answer
    x = 311.62

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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.