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Finding the Fourth Proportional to 308.25, 425.38 and 219.79

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Solution

The fourth proportional to 308.25, 425.38 and 219.79 is: 303.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.25 : 425.38 = 219.79 : x
  2. Step 2: Convert to fraction form
    308.25/425.38 = 219.79/x
  3. Step 3: Cross multiply
    308.25x = 425.38 × 219.79
  4. Step 4: Simplify right side
    308.25x = 93,494.27
  5. Step 5: Solve for x
    x = 93,494.27/308.25
  6. Step 6: Final answer
    x = 303.31

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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.