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Finding the Fourth Proportional to 216.30, 324.18 and 113.33

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Solution

The fourth proportional to 216.30, 324.18 and 113.33 is: 169.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.30 : 324.18 = 113.33 : x
  2. Step 2: Convert to fraction form
    216.30/324.18 = 113.33/x
  3. Step 3: Cross multiply
    216.30x = 324.18 × 113.33
  4. Step 4: Simplify right side
    216.30x = 36,737.13
  5. Step 5: Solve for x
    x = 36,737.13/216.30
  6. Step 6: Final answer
    x = 169.84

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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.