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Finding the Fourth Proportional to 217, 327.13 and 213.76

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Solution

The fourth proportional to 217, 327.13 and 213.76 is: 322.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    217 : 327.13 = 213.76 : x
  2. Step 2: Convert to fraction form
    217/327.13 = 213.76/x
  3. Step 3: Cross multiply
    217x = 327.13 × 213.76
  4. Step 4: Simplify right side
    217x = 69,927.31
  5. Step 5: Solve for x
    x = 69,927.31/217
  6. Step 6: Final answer
    x = 322.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.