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Finding the Fourth Proportional to 308.57, 425.90 and 184.31

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Solution

The fourth proportional to 308.57, 425.90 and 184.31 is: 254.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.57 : 425.90 = 184.31 : x
  2. Step 2: Convert to fraction form
    308.57/425.90 = 184.31/x
  3. Step 3: Cross multiply
    308.57x = 425.90 × 184.31
  4. Step 4: Simplify right side
    308.57x = 78,494.58
  5. Step 5: Solve for x
    x = 78,494.58/308.57
  6. Step 6: Final answer
    x = 254.39

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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.