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Finding the Fourth Proportional to 266.09, 367.16 and 155.55

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Solution

The fourth proportional to 266.09, 367.16 and 155.55 is: 214.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.09 : 367.16 = 155.55 : x
  2. Step 2: Convert to fraction form
    266.09/367.16 = 155.55/x
  3. Step 3: Cross multiply
    266.09x = 367.16 × 155.55
  4. Step 4: Simplify right side
    266.09x = 57,110.96
  5. Step 5: Solve for x
    x = 57,110.96/266.09
  6. Step 6: Final answer
    x = 214.63

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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.