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Finding the Fourth Proportional to 323.37, 485.15 and 161.15

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Solution

The fourth proportional to 323.37, 485.15 and 161.15 is: 241.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.37 : 485.15 = 161.15 : x
  2. Step 2: Convert to fraction form
    323.37/485.15 = 161.15/x
  3. Step 3: Cross multiply
    323.37x = 485.15 × 161.15
  4. Step 4: Simplify right side
    323.37x = 78,178.69
  5. Step 5: Solve for x
    x = 78,178.69/323.37
  6. Step 6: Final answer
    x = 241.76

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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.