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Finding the Fourth Proportional to 538.11, 806.67 and 191.21

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Solution

The fourth proportional to 538.11, 806.67 and 191.21 is: 286.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.11 : 806.67 = 191.21 : x
  2. Step 2: Convert to fraction form
    538.11/806.67 = 191.21/x
  3. Step 3: Cross multiply
    538.11x = 806.67 × 191.21
  4. Step 4: Simplify right side
    538.11x = 154,239.34
  5. Step 5: Solve for x
    x = 154,239.34/538.11
  6. Step 6: Final answer
    x = 286.63

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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.