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Finding the Fourth Proportional to 563.11, 842.87 and 331.45

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Solution

The fourth proportional to 563.11, 842.87 and 331.45 is: 496.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.11 : 842.87 = 331.45 : x
  2. Step 2: Convert to fraction form
    563.11/842.87 = 331.45/x
  3. Step 3: Cross multiply
    563.11x = 842.87 × 331.45
  4. Step 4: Simplify right side
    563.11x = 279,367.60
  5. Step 5: Solve for x
    x = 279,367.60/563.11
  6. Step 6: Final answer
    x = 496.12

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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.