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Finding the Fourth Proportional to 1,093.80, 1,640.22 and 323.88

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Solution

The fourth proportional to 1,093.80, 1,640.22 and 323.88 is: 485.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,093.80 : 1,640.22 = 323.88 : x
  2. Step 2: Convert to fraction form
    1,093.80/1,640.22 = 323.88/x
  3. Step 3: Cross multiply
    1,093.80x = 1,640.22 × 323.88
  4. Step 4: Simplify right side
    1,093.80x = 531,234.45
  5. Step 5: Solve for x
    x = 531,234.45/1,093.80
  6. Step 6: Final answer
    x = 485.68

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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.