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Finding the Fourth Proportional to 308.18, 460.40 and 220.82

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Solution

The fourth proportional to 308.18, 460.40 and 220.82 is: 329.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.18 : 460.40 = 220.82 : x
  2. Step 2: Convert to fraction form
    308.18/460.40 = 220.82/x
  3. Step 3: Cross multiply
    308.18x = 460.40 × 220.82
  4. Step 4: Simplify right side
    308.18x = 101,665.53
  5. Step 5: Solve for x
    x = 101,665.53/308.18
  6. Step 6: Final answer
    x = 329.89

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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.