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Finding the Fourth Proportional to 376.11, 563.36 and 213.30

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Solution

The fourth proportional to 376.11, 563.36 and 213.30 is: 319.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.11 : 563.36 = 213.30 : x
  2. Step 2: Convert to fraction form
    376.11/563.36 = 213.30/x
  3. Step 3: Cross multiply
    376.11x = 563.36 × 213.30
  4. Step 4: Simplify right side
    376.11x = 120,163.62
  5. Step 5: Solve for x
    x = 120,163.62/376.11
  6. Step 6: Final answer
    x = 319.49

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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.