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Finding the Fourth Proportional to 215.94, 323.42 and 154.86

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Solution

The fourth proportional to 215.94, 323.42 and 154.86 is: 231.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.94 : 323.42 = 154.86 : x
  2. Step 2: Convert to fraction form
    215.94/323.42 = 154.86/x
  3. Step 3: Cross multiply
    215.94x = 323.42 × 154.86
  4. Step 4: Simplify right side
    215.94x = 50,084.82
  5. Step 5: Solve for x
    x = 50,084.82/215.94
  6. Step 6: Final answer
    x = 231.94

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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.