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Finding the Fourth Proportional to 376.72, 519.82 and 221.47

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Solution

The fourth proportional to 376.72, 519.82 and 221.47 is: 305.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.72 : 519.82 = 221.47 : x
  2. Step 2: Convert to fraction form
    376.72/519.82 = 221.47/x
  3. Step 3: Cross multiply
    376.72x = 519.82 × 221.47
  4. Step 4: Simplify right side
    376.72x = 115,124.54
  5. Step 5: Solve for x
    x = 115,124.54/376.72
  6. Step 6: Final answer
    x = 305.60

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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.