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Finding the Fourth Proportional to 308.47, 425.84 and 238.37

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Solution

The fourth proportional to 308.47, 425.84 and 238.37 is: 329.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.47 : 425.84 = 238.37 : x
  2. Step 2: Convert to fraction form
    308.47/425.84 = 238.37/x
  3. Step 3: Cross multiply
    308.47x = 425.84 × 238.37
  4. Step 4: Simplify right side
    308.47x = 101,506.70
  5. Step 5: Solve for x
    x = 101,506.70/308.47
  6. Step 6: Final answer
    x = 329.07

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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.