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Finding the Fourth Proportional to 308.28, 425.33 and 284.97

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Solution

The fourth proportional to 308.28, 425.33 and 284.97 is: 393.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.28 : 425.33 = 284.97 : x
  2. Step 2: Convert to fraction form
    308.28/425.33 = 284.97/x
  3. Step 3: Cross multiply
    308.28x = 425.33 × 284.97
  4. Step 4: Simplify right side
    308.28x = 121,206.29
  5. Step 5: Solve for x
    x = 121,206.29/308.28
  6. Step 6: Final answer
    x = 393.17

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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.