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Finding the Fourth Proportional to 243.88, 364.21 and 217

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Solution

The fourth proportional to 243.88, 364.21 and 217 is: 324.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.88 : 364.21 = 217 : x
  2. Step 2: Convert to fraction form
    243.88/364.21 = 217/x
  3. Step 3: Cross multiply
    243.88x = 364.21 × 217
  4. Step 4: Simplify right side
    243.88x = 79,033.57
  5. Step 5: Solve for x
    x = 79,033.57/243.88
  6. Step 6: Final answer
    x = 324.07

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.