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Finding the Fourth Proportional to 308.75, 463.28 and 126.05

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Solution

The fourth proportional to 308.75, 463.28 and 126.05 is: 189.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.75 : 463.28 = 126.05 : x
  2. Step 2: Convert to fraction form
    308.75/463.28 = 126.05/x
  3. Step 3: Cross multiply
    308.75x = 463.28 × 126.05
  4. Step 4: Simplify right side
    308.75x = 58,394.44
  5. Step 5: Solve for x
    x = 58,394.44/308.75
  6. Step 6: Final answer
    x = 189.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.