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Finding the Fourth Proportional to 308.26, 461.99 and 145.61

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Solution

The fourth proportional to 308.26, 461.99 and 145.61 is: 218.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.26 : 461.99 = 145.61 : x
  2. Step 2: Convert to fraction form
    308.26/461.99 = 145.61/x
  3. Step 3: Cross multiply
    308.26x = 461.99 × 145.61
  4. Step 4: Simplify right side
    308.26x = 67,270.36
  5. Step 5: Solve for x
    x = 67,270.36/308.26
  6. Step 6: Final answer
    x = 218.23

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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.