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Finding the Fourth Proportional to 366.95, 550.40 and 220.75

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Solution

The fourth proportional to 366.95, 550.40 and 220.75 is: 331.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    366.95 : 550.40 = 220.75 : x
  2. Step 2: Convert to fraction form
    366.95/550.40 = 220.75/x
  3. Step 3: Cross multiply
    366.95x = 550.40 × 220.75
  4. Step 4: Simplify right side
    366.95x = 121,499.98
  5. Step 5: Solve for x
    x = 121,499.98/366.95
  6. Step 6: Final answer
    x = 331.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.