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Finding the Fourth Proportional to 539.50, 809.20 and 192.82

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Solution

The fourth proportional to 539.50, 809.20 and 192.82 is: 289.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.50 : 809.20 = 192.82 : x
  2. Step 2: Convert to fraction form
    539.50/809.20 = 192.82/x
  3. Step 3: Cross multiply
    539.50x = 809.20 × 192.82
  4. Step 4: Simplify right side
    539.50x = 156,029.94
  5. Step 5: Solve for x
    x = 156,029.94/539.50
  6. Step 6: Final answer
    x = 289.21

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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.