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Finding the Fourth Proportional to 376.49, 519.73 and 221.25

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Solution

The fourth proportional to 376.49, 519.73 and 221.25 is: 305.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.49 : 519.73 = 221.25 : x
  2. Step 2: Convert to fraction form
    376.49/519.73 = 221.25/x
  3. Step 3: Cross multiply
    376.49x = 519.73 × 221.25
  4. Step 4: Simplify right side
    376.49x = 114,989.16
  5. Step 5: Solve for x
    x = 114,989.16/376.49
  6. Step 6: Final answer
    x = 305.42

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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.