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Finding the Fourth Proportional to 324.11, 447.77 and 321.68

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Solution

The fourth proportional to 324.11, 447.77 and 321.68 is: 444.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.11 : 447.77 = 321.68 : x
  2. Step 2: Convert to fraction form
    324.11/447.77 = 321.68/x
  3. Step 3: Cross multiply
    324.11x = 447.77 × 321.68
  4. Step 4: Simplify right side
    324.11x = 144,034.81
  5. Step 5: Solve for x
    x = 144,034.81/324.11
  6. Step 6: Final answer
    x = 444.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.