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Finding the Fourth Proportional to 308.62, 425.56 and 198.10

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Solution

The fourth proportional to 308.62, 425.56 and 198.10 is: 273.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.62 : 425.56 = 198.10 : x
  2. Step 2: Convert to fraction form
    308.62/425.56 = 198.10/x
  3. Step 3: Cross multiply
    308.62x = 425.56 × 198.10
  4. Step 4: Simplify right side
    308.62x = 84,303.44
  5. Step 5: Solve for x
    x = 84,303.44/308.62
  6. Step 6: Final answer
    x = 273.16

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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.