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Finding the Fourth Proportional to 376.76, 519.92 and 221.52

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Solution

The fourth proportional to 376.76, 519.92 and 221.52 is: 305.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.76 : 519.92 = 221.52 : x
  2. Step 2: Convert to fraction form
    376.76/519.92 = 221.52/x
  3. Step 3: Cross multiply
    376.76x = 519.92 × 221.52
  4. Step 4: Simplify right side
    376.76x = 115,172.68
  5. Step 5: Solve for x
    x = 115,172.68/376.76
  6. Step 6: Final answer
    x = 305.69

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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.