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Finding the Fourth Proportional to 539.22, 806.82 and 385.53

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Solution

The fourth proportional to 539.22, 806.82 and 385.53 is: 576.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.22 : 806.82 = 385.53 : x
  2. Step 2: Convert to fraction form
    539.22/806.82 = 385.53/x
  3. Step 3: Cross multiply
    539.22x = 806.82 × 385.53
  4. Step 4: Simplify right side
    539.22x = 311,053.31
  5. Step 5: Solve for x
    x = 311,053.31/539.22
  6. Step 6: Final answer
    x = 576.86

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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.