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Finding the Fourth Proportional to 216.69, 324.44 and 151.75

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Solution

The fourth proportional to 216.69, 324.44 and 151.75 is: 227.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.69 : 324.44 = 151.75 : x
  2. Step 2: Convert to fraction form
    216.69/324.44 = 151.75/x
  3. Step 3: Cross multiply
    216.69x = 324.44 × 151.75
  4. Step 4: Simplify right side
    216.69x = 49,233.77
  5. Step 5: Solve for x
    x = 49,233.77/216.69
  6. Step 6: Final answer
    x = 227.21

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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.