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Finding the Fourth Proportional to 308.75, 426.65 and 234.93

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Solution

The fourth proportional to 308.75, 426.65 and 234.93 is: 324.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.75 : 426.65 = 234.93 : x
  2. Step 2: Convert to fraction form
    308.75/426.65 = 234.93/x
  3. Step 3: Cross multiply
    308.75x = 426.65 × 234.93
  4. Step 4: Simplify right side
    308.75x = 100,232.88
  5. Step 5: Solve for x
    x = 100,232.88/308.75
  6. Step 6: Final answer
    x = 324.64

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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.