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Finding the Fourth Proportional to 308.62, 425.60 and 238.58

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Solution

The fourth proportional to 308.62, 425.60 and 238.58 is: 329.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.62 : 425.60 = 238.58 : x
  2. Step 2: Convert to fraction form
    308.62/425.60 = 238.58/x
  3. Step 3: Cross multiply
    308.62x = 425.60 × 238.58
  4. Step 4: Simplify right side
    308.62x = 101,537.52
  5. Step 5: Solve for x
    x = 101,537.52/308.62
  6. Step 6: Final answer
    x = 329.01

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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.