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Finding the Fourth Proportional to 217.71, 327.81 and 157.26

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Solution

The fourth proportional to 217.71, 327.81 and 157.26 is: 236.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.71 : 327.81 = 157.26 : x
  2. Step 2: Convert to fraction form
    217.71/327.81 = 157.26/x
  3. Step 3: Cross multiply
    217.71x = 327.81 × 157.26
  4. Step 4: Simplify right side
    217.71x = 51,551.40
  5. Step 5: Solve for x
    x = 51,551.40/217.71
  6. Step 6: Final answer
    x = 236.79

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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.