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Finding the Fourth Proportional to 266.96, 401.28 and 219.92

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Solution

The fourth proportional to 266.96, 401.28 and 219.92 is: 330.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.96 : 401.28 = 219.92 : x
  2. Step 2: Convert to fraction form
    266.96/401.28 = 219.92/x
  3. Step 3: Cross multiply
    266.96x = 401.28 × 219.92
  4. Step 4: Simplify right side
    266.96x = 88,249.50
  5. Step 5: Solve for x
    x = 88,249.50/266.96
  6. Step 6: Final answer
    x = 330.57

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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.