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Finding the Fourth Proportional to 308.82, 426.33 and 210.54

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Solution

The fourth proportional to 308.82, 426.33 and 210.54 is: 290.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.82 : 426.33 = 210.54 : x
  2. Step 2: Convert to fraction form
    308.82/426.33 = 210.54/x
  3. Step 3: Cross multiply
    308.82x = 426.33 × 210.54
  4. Step 4: Simplify right side
    308.82x = 89,759.52
  5. Step 5: Solve for x
    x = 89,759.52/308.82
  6. Step 6: Final answer
    x = 290.65

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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.