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Finding the Fourth Proportional to 266.12, 399.36 and 163.61

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Solution

The fourth proportional to 266.12, 399.36 and 163.61 is: 245.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.12 : 399.36 = 163.61 : x
  2. Step 2: Convert to fraction form
    266.12/399.36 = 163.61/x
  3. Step 3: Cross multiply
    266.12x = 399.36 × 163.61
  4. Step 4: Simplify right side
    266.12x = 65,339.29
  5. Step 5: Solve for x
    x = 65,339.29/266.12
  6. Step 6: Final answer
    x = 245.53

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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.