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Finding the Fourth Proportional to 321.09, 481.47 and 223.63

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Solution

The fourth proportional to 321.09, 481.47 and 223.63 is: 335.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.09 : 481.47 = 223.63 : x
  2. Step 2: Convert to fraction form
    321.09/481.47 = 223.63/x
  3. Step 3: Cross multiply
    321.09x = 481.47 × 223.63
  4. Step 4: Simplify right side
    321.09x = 107,673.06
  5. Step 5: Solve for x
    x = 107,673.06/321.09
  6. Step 6: Final answer
    x = 335.34

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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.