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Finding the Fourth Proportional to 539.31, 809.11 and 169.12

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Solution

The fourth proportional to 539.31, 809.11 and 169.12 is: 253.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.31 : 809.11 = 169.12 : x
  2. Step 2: Convert to fraction form
    539.31/809.11 = 169.12/x
  3. Step 3: Cross multiply
    539.31x = 809.11 × 169.12
  4. Step 4: Simplify right side
    539.31x = 136,836.67
  5. Step 5: Solve for x
    x = 136,836.67/539.31
  6. Step 6: Final answer
    x = 253.72

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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.