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Finding the Fourth Proportional to 266.82, 400.48 and 136.91

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Solution

The fourth proportional to 266.82, 400.48 and 136.91 is: 205.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.82 : 400.48 = 136.91 : x
  2. Step 2: Convert to fraction form
    266.82/400.48 = 136.91/x
  3. Step 3: Cross multiply
    266.82x = 400.48 × 136.91
  4. Step 4: Simplify right side
    266.82x = 54,829.72
  5. Step 5: Solve for x
    x = 54,829.72/266.82
  6. Step 6: Final answer
    x = 205.49

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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.