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Finding the Fourth Proportional to 321.86, 443.94 and 223.68

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Solution

The fourth proportional to 321.86, 443.94 and 223.68 is: 308.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.86 : 443.94 = 223.68 : x
  2. Step 2: Convert to fraction form
    321.86/443.94 = 223.68/x
  3. Step 3: Cross multiply
    321.86x = 443.94 × 223.68
  4. Step 4: Simplify right side
    321.86x = 99,300.50
  5. Step 5: Solve for x
    x = 99,300.50/321.86
  6. Step 6: Final answer
    x = 308.52

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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.