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Finding the Fourth Proportional to 204.39, 282.15 and 149.55

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Solution

The fourth proportional to 204.39, 282.15 and 149.55 is: 206.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.39 : 282.15 = 149.55 : x
  2. Step 2: Convert to fraction form
    204.39/282.15 = 149.55/x
  3. Step 3: Cross multiply
    204.39x = 282.15 × 149.55
  4. Step 4: Simplify right side
    204.39x = 42,195.53
  5. Step 5: Solve for x
    x = 42,195.53/204.39
  6. Step 6: Final answer
    x = 206.45

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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.