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Finding the Fourth Proportional to 268.35, 401.55 and 163.86

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Solution

The fourth proportional to 268.35, 401.55 and 163.86 is: 245.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.35 : 401.55 = 163.86 : x
  2. Step 2: Convert to fraction form
    268.35/401.55 = 163.86/x
  3. Step 3: Cross multiply
    268.35x = 401.55 × 163.86
  4. Step 4: Simplify right side
    268.35x = 65,797.98
  5. Step 5: Solve for x
    x = 65,797.98/268.35
  6. Step 6: Final answer
    x = 245.19

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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.