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Finding the Fourth Proportional to 537.21, 805.81 and 331.15

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Solution

The fourth proportional to 537.21, 805.81 and 331.15 is: 496.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    537.21 : 805.81 = 331.15 : x
  2. Step 2: Convert to fraction form
    537.21/805.81 = 331.15/x
  3. Step 3: Cross multiply
    537.21x = 805.81 × 331.15
  4. Step 4: Simplify right side
    537.21x = 266,843.98
  5. Step 5: Solve for x
    x = 266,843.98/537.21
  6. Step 6: Final answer
    x = 496.72

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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.