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Finding the Fourth Proportional to 376.75, 519.93 and 221.59

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Solution

The fourth proportional to 376.75, 519.93 and 221.59 is: 305.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.75 : 519.93 = 221.59 : x
  2. Step 2: Convert to fraction form
    376.75/519.93 = 221.59/x
  3. Step 3: Cross multiply
    376.75x = 519.93 × 221.59
  4. Step 4: Simplify right side
    376.75x = 115,211.29
  5. Step 5: Solve for x
    x = 115,211.29/376.75
  6. Step 6: Final answer
    x = 305.80

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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.