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Finding the Fourth Proportional to 266.21, 367.34 and 155.66

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Solution

The fourth proportional to 266.21, 367.34 and 155.66 is: 214.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.21 : 367.34 = 155.66 : x
  2. Step 2: Convert to fraction form
    266.21/367.34 = 155.66/x
  3. Step 3: Cross multiply
    266.21x = 367.34 × 155.66
  4. Step 4: Simplify right side
    266.21x = 57,177.53
  5. Step 5: Solve for x
    x = 57,177.53/266.21
  6. Step 6: Final answer
    x = 214.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.