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Finding the Fourth Proportional to 215.80, 323.43 and 112.83

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Solution

The fourth proportional to 215.80, 323.43 and 112.83 is: 169.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.80 : 323.43 = 112.83 : x
  2. Step 2: Convert to fraction form
    215.80/323.43 = 112.83/x
  3. Step 3: Cross multiply
    215.80x = 323.43 × 112.83
  4. Step 4: Simplify right side
    215.80x = 36,490.97
  5. Step 5: Solve for x
    x = 36,490.97/215.80
  6. Step 6: Final answer
    x = 169.10

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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.