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Finding the Fourth Proportional to 376.60, 519.62 and 221.36

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Solution

The fourth proportional to 376.60, 519.62 and 221.36 is: 305.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.60 : 519.62 = 221.36 : x
  2. Step 2: Convert to fraction form
    376.60/519.62 = 221.36/x
  3. Step 3: Cross multiply
    376.60x = 519.62 × 221.36
  4. Step 4: Simplify right side
    376.60x = 115,023.08
  5. Step 5: Solve for x
    x = 115,023.08/376.60
  6. Step 6: Final answer
    x = 305.43

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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.