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Finding the Fourth Proportional to 539.38, 809.18 and 174.20

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Solution

The fourth proportional to 539.38, 809.18 and 174.20 is: 261.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.38 : 809.18 = 174.20 : x
  2. Step 2: Convert to fraction form
    539.38/809.18 = 174.20/x
  3. Step 3: Cross multiply
    539.38x = 809.18 × 174.20
  4. Step 4: Simplify right side
    539.38x = 140,955.55
  5. Step 5: Solve for x
    x = 140,955.55/539.38
  6. Step 6: Final answer
    x = 261.33

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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.