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Finding the Fourth Proportional to 321.67, 444.01 and 222.35

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Solution

The fourth proportional to 321.67, 444.01 and 222.35 is: 306.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.67 : 444.01 = 222.35 : x
  2. Step 2: Convert to fraction form
    321.67/444.01 = 222.35/x
  3. Step 3: Cross multiply
    321.67x = 444.01 × 222.35
  4. Step 4: Simplify right side
    321.67x = 98,722.64
  5. Step 5: Solve for x
    x = 98,722.64/321.67
  6. Step 6: Final answer
    x = 306.91

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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.