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Finding the Fourth Proportional to 215.88, 325.61 and 213.44

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Solution

The fourth proportional to 215.88, 325.61 and 213.44 is: 321.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.88 : 325.61 = 213.44 : x
  2. Step 2: Convert to fraction form
    215.88/325.61 = 213.44/x
  3. Step 3: Cross multiply
    215.88x = 325.61 × 213.44
  4. Step 4: Simplify right side
    215.88x = 69,498.20
  5. Step 5: Solve for x
    x = 69,498.20/215.88
  6. Step 6: Final answer
    x = 321.93

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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.