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Finding the Fourth Proportional to 268.72, 370.87 and 163.85

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Solution

The fourth proportional to 268.72, 370.87 and 163.85 is: 226.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.72 : 370.87 = 163.85 : x
  2. Step 2: Convert to fraction form
    268.72/370.87 = 163.85/x
  3. Step 3: Cross multiply
    268.72x = 370.87 × 163.85
  4. Step 4: Simplify right side
    268.72x = 60,764.79
  5. Step 5: Solve for x
    x = 60,764.79/268.72
  6. Step 6: Final answer
    x = 226.13

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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.