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Finding the Fourth Proportional to 215.52, 325.04 and 213.22

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Solution

The fourth proportional to 215.52, 325.04 and 213.22 is: 321.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.52 : 325.04 = 213.22 : x
  2. Step 2: Convert to fraction form
    215.52/325.04 = 213.22/x
  3. Step 3: Cross multiply
    215.52x = 325.04 × 213.22
  4. Step 4: Simplify right side
    215.52x = 69,305.03
  5. Step 5: Solve for x
    x = 69,305.03/215.52
  6. Step 6: Final answer
    x = 321.57

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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.