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Finding the Fourth Proportional to 322.18, 481.31 and 205.69

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Solution

The fourth proportional to 322.18, 481.31 and 205.69 is: 307.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.18 : 481.31 = 205.69 : x
  2. Step 2: Convert to fraction form
    322.18/481.31 = 205.69/x
  3. Step 3: Cross multiply
    322.18x = 481.31 × 205.69
  4. Step 4: Simplify right side
    322.18x = 99,000.65
  5. Step 5: Solve for x
    x = 99,000.65/322.18
  6. Step 6: Final answer
    x = 307.28

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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.