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Finding the Fourth Proportional to 215.41, 321.38 and 195.92

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Solution

The fourth proportional to 215.41, 321.38 and 195.92 is: 292.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.41 : 321.38 = 195.92 : x
  2. Step 2: Convert to fraction form
    215.41/321.38 = 195.92/x
  3. Step 3: Cross multiply
    215.41x = 321.38 × 195.92
  4. Step 4: Simplify right side
    215.41x = 62,964.59
  5. Step 5: Solve for x
    x = 62,964.59/215.41
  6. Step 6: Final answer
    x = 292.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.