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Finding the Fourth Proportional to 213.21, 319.27 and 195.39

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Solution

The fourth proportional to 213.21, 319.27 and 195.39 is: 292.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.21 : 319.27 = 195.39 : x
  2. Step 2: Convert to fraction form
    213.21/319.27 = 195.39/x
  3. Step 3: Cross multiply
    213.21x = 319.27 × 195.39
  4. Step 4: Simplify right side
    213.21x = 62,382.17
  5. Step 5: Solve for x
    x = 62,382.17/213.21
  6. Step 6: Final answer
    x = 292.59

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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.