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Finding the Fourth Proportional to 366.75, 505.98 and 217.31

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Solution

The fourth proportional to 366.75, 505.98 and 217.31 is: 299.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    366.75 : 505.98 = 217.31 : x
  2. Step 2: Convert to fraction form
    366.75/505.98 = 217.31/x
  3. Step 3: Cross multiply
    366.75x = 505.98 × 217.31
  4. Step 4: Simplify right side
    366.75x = 109,951.98
  5. Step 5: Solve for x
    x = 109,951.98/366.75
  6. Step 6: Final answer
    x = 299.80

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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.