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Finding the Fourth Proportional to 397.92, 596.78 and 154.34

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Solution

The fourth proportional to 397.92, 596.78 and 154.34 is: 231.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.92 : 596.78 = 154.34 : x
  2. Step 2: Convert to fraction form
    397.92/596.78 = 154.34/x
  3. Step 3: Cross multiply
    397.92x = 596.78 × 154.34
  4. Step 4: Simplify right side
    397.92x = 92,107.03
  5. Step 5: Solve for x
    x = 92,107.03/397.92
  6. Step 6: Final answer
    x = 231.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.