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Finding the Fourth Proportional to 216.91, 325.25 and 155.18

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Solution

The fourth proportional to 216.91, 325.25 and 155.18 is: 232.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.91 : 325.25 = 155.18 : x
  2. Step 2: Convert to fraction form
    216.91/325.25 = 155.18/x
  3. Step 3: Cross multiply
    216.91x = 325.25 × 155.18
  4. Step 4: Simplify right side
    216.91x = 50,472.30
  5. Step 5: Solve for x
    x = 50,472.30/216.91
  6. Step 6: Final answer
    x = 232.69

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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.