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Finding the Fourth Proportional to 539.27, 809.12 and 231.11

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Solution

The fourth proportional to 539.27, 809.12 and 231.11 is: 346.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.27 : 809.12 = 231.11 : x
  2. Step 2: Convert to fraction form
    539.27/809.12 = 231.11/x
  3. Step 3: Cross multiply
    539.27x = 809.12 × 231.11
  4. Step 4: Simplify right side
    539.27x = 186,990.52
  5. Step 5: Solve for x
    x = 186,990.52/539.27
  6. Step 6: Final answer
    x = 346.75

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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.