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Finding the Fourth Proportional to 216.64, 324.84 and 180.64

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Solution

The fourth proportional to 216.64, 324.84 and 180.64 is: 270.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.64 : 324.84 = 180.64 : x
  2. Step 2: Convert to fraction form
    216.64/324.84 = 180.64/x
  3. Step 3: Cross multiply
    216.64x = 324.84 × 180.64
  4. Step 4: Simplify right side
    216.64x = 58,679.10
  5. Step 5: Solve for x
    x = 58,679.10/216.64
  6. Step 6: Final answer
    x = 270.86

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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.