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Finding the Fourth Proportional to 321.79, 481.30 and 298.44

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Solution

The fourth proportional to 321.79, 481.30 and 298.44 is: 446.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.79 : 481.30 = 298.44 : x
  2. Step 2: Convert to fraction form
    321.79/481.30 = 298.44/x
  3. Step 3: Cross multiply
    321.79x = 481.30 × 298.44
  4. Step 4: Simplify right side
    321.79x = 143,641.04
  5. Step 5: Solve for x
    x = 143,641.04/321.79
  6. Step 6: Final answer
    x = 446.39

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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.