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Finding the Fourth Proportional to 376.21, 564.36 and 213.85

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Solution

The fourth proportional to 376.21, 564.36 and 213.85 is: 320.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.21 : 564.36 = 213.85 : x
  2. Step 2: Convert to fraction form
    376.21/564.36 = 213.85/x
  3. Step 3: Cross multiply
    376.21x = 564.36 × 213.85
  4. Step 4: Simplify right side
    376.21x = 120,688.39
  5. Step 5: Solve for x
    x = 120,688.39/376.21
  6. Step 6: Final answer
    x = 320.80

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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.