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Finding the Fourth Proportional to 308.25, 425.39 and 170.25

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Solution

The fourth proportional to 308.25, 425.39 and 170.25 is: 234.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.25 : 425.39 = 170.25 : x
  2. Step 2: Convert to fraction form
    308.25/425.39 = 170.25/x
  3. Step 3: Cross multiply
    308.25x = 425.39 × 170.25
  4. Step 4: Simplify right side
    308.25x = 72,421.80
  5. Step 5: Solve for x
    x = 72,421.80/308.25
  6. Step 6: Final answer
    x = 234.95

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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.