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Finding the Fourth Proportional to 308.46, 425.96 and 215.52

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Solution

The fourth proportional to 308.46, 425.96 and 215.52 is: 297.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.46 : 425.96 = 215.52 : x
  2. Step 2: Convert to fraction form
    308.46/425.96 = 215.52/x
  3. Step 3: Cross multiply
    308.46x = 425.96 × 215.52
  4. Step 4: Simplify right side
    308.46x = 91,802.90
  5. Step 5: Solve for x
    x = 91,802.90/308.46
  6. Step 6: Final answer
    x = 297.62

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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.