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Finding the Fourth Proportional to 376.26, 519.30 and 221

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Solution

The fourth proportional to 376.26, 519.30 and 221 is: 305.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.26 : 519.30 = 221 : x
  2. Step 2: Convert to fraction form
    376.26/519.30 = 221/x
  3. Step 3: Cross multiply
    376.26x = 519.30 × 221
  4. Step 4: Simplify right side
    376.26x = 114,765.30
  5. Step 5: Solve for x
    x = 114,765.30/376.26
  6. Step 6: Final answer
    x = 305.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.