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Finding the Fourth Proportional to 308.25, 425.07 and 203.40

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Solution

The fourth proportional to 308.25, 425.07 and 203.40 is: 280.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.25 : 425.07 = 203.40 : x
  2. Step 2: Convert to fraction form
    308.25/425.07 = 203.40/x
  3. Step 3: Cross multiply
    308.25x = 425.07 × 203.40
  4. Step 4: Simplify right side
    308.25x = 86,459.24
  5. Step 5: Solve for x
    x = 86,459.24/308.25
  6. Step 6: Final answer
    x = 280.48

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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.