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Finding the Fourth Proportional to 217.44, 325.86 and 156.30

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Solution

The fourth proportional to 217.44, 325.86 and 156.30 is: 234.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.44 : 325.86 = 156.30 : x
  2. Step 2: Convert to fraction form
    217.44/325.86 = 156.30/x
  3. Step 3: Cross multiply
    217.44x = 325.86 × 156.30
  4. Step 4: Simplify right side
    217.44x = 50,931.92
  5. Step 5: Solve for x
    x = 50,931.92/217.44
  6. Step 6: Final answer
    x = 234.23

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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.