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Finding the Fourth Proportional to 217.32, 327.26 and 156.87

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Solution

The fourth proportional to 217.32, 327.26 and 156.87 is: 236.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.32 : 327.26 = 156.87 : x
  2. Step 2: Convert to fraction form
    217.32/327.26 = 156.87/x
  3. Step 3: Cross multiply
    217.32x = 327.26 × 156.87
  4. Step 4: Simplify right side
    217.32x = 51,336.79
  5. Step 5: Solve for x
    x = 51,336.79/217.32
  6. Step 6: Final answer
    x = 236.23

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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.