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Finding the Fourth Proportional to 215.28, 324.20 and 181.26

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Solution

The fourth proportional to 215.28, 324.20 and 181.26 is: 272.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.28 : 324.20 = 181.26 : x
  2. Step 2: Convert to fraction form
    215.28/324.20 = 181.26/x
  3. Step 3: Cross multiply
    215.28x = 324.20 × 181.26
  4. Step 4: Simplify right side
    215.28x = 58,763.59
  5. Step 5: Solve for x
    x = 58,763.59/215.28
  6. Step 6: Final answer
    x = 272.96

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.