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Finding the Fourth Proportional to 216.09, 324.14 and 113.23

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Solution

The fourth proportional to 216.09, 324.14 and 113.23 is: 169.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.09 : 324.14 = 113.23 : x
  2. Step 2: Convert to fraction form
    216.09/324.14 = 113.23/x
  3. Step 3: Cross multiply
    216.09x = 324.14 × 113.23
  4. Step 4: Simplify right side
    216.09x = 36,702.21
  5. Step 5: Solve for x
    x = 36,702.21/216.09
  6. Step 6: Final answer
    x = 169.85

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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.