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Finding the Fourth Proportional to 266.27, 399.11 and 173.61

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Solution

The fourth proportional to 266.27, 399.11 and 173.61 is: 260.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.27 : 399.11 = 173.61 : x
  2. Step 2: Convert to fraction form
    266.27/399.11 = 173.61/x
  3. Step 3: Cross multiply
    266.27x = 399.11 × 173.61
  4. Step 4: Simplify right side
    266.27x = 69,288.64
  5. Step 5: Solve for x
    x = 69,288.64/266.27
  6. Step 6: Final answer
    x = 260.21

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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.