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Finding the Fourth Proportional to 266.15, 398.89 and 127.33

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Solution

The fourth proportional to 266.15, 398.89 and 127.33 is: 190.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.15 : 398.89 = 127.33 : x
  2. Step 2: Convert to fraction form
    266.15/398.89 = 127.33/x
  3. Step 3: Cross multiply
    266.15x = 398.89 × 127.33
  4. Step 4: Simplify right side
    266.15x = 50,790.66
  5. Step 5: Solve for x
    x = 50,790.66/266.15
  6. Step 6: Final answer
    x = 190.83

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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.