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Finding the Fourth Proportional to 323.32, 484.89 and 103.90

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Solution

The fourth proportional to 323.32, 484.89 and 103.90 is: 155.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.32 : 484.89 = 103.90 : x
  2. Step 2: Convert to fraction form
    323.32/484.89 = 103.90/x
  3. Step 3: Cross multiply
    323.32x = 484.89 × 103.90
  4. Step 4: Simplify right side
    323.32x = 50,377.65
  5. Step 5: Solve for x
    x = 50,377.65/323.32
  6. Step 6: Final answer
    x = 155.82

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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.