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Finding the Fourth Proportional to 322.22, 481.22 and 320.15

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Solution

The fourth proportional to 322.22, 481.22 and 320.15 is: 478.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.22 : 481.22 = 320.15 : x
  2. Step 2: Convert to fraction form
    322.22/481.22 = 320.15/x
  3. Step 3: Cross multiply
    322.22x = 481.22 × 320.15
  4. Step 4: Simplify right side
    322.22x = 154,058.58
  5. Step 5: Solve for x
    x = 154,058.58/322.22
  6. Step 6: Final answer
    x = 478.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.