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Finding the Fourth Proportional to 217.38, 325.79 and 159.59

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Solution

The fourth proportional to 217.38, 325.79 and 159.59 is: 239.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.38 : 325.79 = 159.59 : x
  2. Step 2: Convert to fraction form
    217.38/325.79 = 159.59/x
  3. Step 3: Cross multiply
    217.38x = 325.79 × 159.59
  4. Step 4: Simplify right side
    217.38x = 51,990.40
  5. Step 5: Solve for x
    x = 51,990.40/217.38
  6. Step 6: Final answer
    x = 239.17

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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.