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Finding the Fourth Proportional to 324.55, 450.99 and 321.22

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Solution

The fourth proportional to 324.55, 450.99 and 321.22 is: 446.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.55 : 450.99 = 321.22 : x
  2. Step 2: Convert to fraction form
    324.55/450.99 = 321.22/x
  3. Step 3: Cross multiply
    324.55x = 450.99 × 321.22
  4. Step 4: Simplify right side
    324.55x = 144,863.15
  5. Step 5: Solve for x
    x = 144,863.15/324.55
  6. Step 6: Final answer
    x = 446.36

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.