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Finding the Fourth Proportional to 216.31, 323.69 and 158.39

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Solution

The fourth proportional to 216.31, 323.69 and 158.39 is: 237.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.31 : 323.69 = 158.39 : x
  2. Step 2: Convert to fraction form
    216.31/323.69 = 158.39/x
  3. Step 3: Cross multiply
    216.31x = 323.69 × 158.39
  4. Step 4: Simplify right side
    216.31x = 51,268.66
  5. Step 5: Solve for x
    x = 51,268.66/216.31
  6. Step 6: Final answer
    x = 237.02

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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.