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Finding the Fourth Proportional to 266.63, 400.28 and 221.27

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Solution

The fourth proportional to 266.63, 400.28 and 221.27 is: 332.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.63 : 400.28 = 221.27 : x
  2. Step 2: Convert to fraction form
    266.63/400.28 = 221.27/x
  3. Step 3: Cross multiply
    266.63x = 400.28 × 221.27
  4. Step 4: Simplify right side
    266.63x = 88,566.85
  5. Step 5: Solve for x
    x = 88,566.85/266.63
  6. Step 6: Final answer
    x = 332.18

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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.