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Finding the Fourth Proportional to 216.65, 325.08 and 94.85

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Solution

The fourth proportional to 216.65, 325.08 and 94.85 is: 142.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.65 : 325.08 = 94.85 : x
  2. Step 2: Convert to fraction form
    216.65/325.08 = 94.85/x
  3. Step 3: Cross multiply
    216.65x = 325.08 × 94.85
  4. Step 4: Simplify right side
    216.65x = 30,833.84
  5. Step 5: Solve for x
    x = 30,833.84/216.65
  6. Step 6: Final answer
    x = 142.32

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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.