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Finding the Fourth Proportional to 308.43, 462.51 and 135.09

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Solution

The fourth proportional to 308.43, 462.51 and 135.09 is: 202.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.43 : 462.51 = 135.09 : x
  2. Step 2: Convert to fraction form
    308.43/462.51 = 135.09/x
  3. Step 3: Cross multiply
    308.43x = 462.51 × 135.09
  4. Step 4: Simplify right side
    308.43x = 62,480.48
  5. Step 5: Solve for x
    x = 62,480.48/308.43
  6. Step 6: Final answer
    x = 202.58

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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.