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Finding the Fourth Proportional to 204.75, 282.80 and 135.63

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Solution

The fourth proportional to 204.75, 282.80 and 135.63 is: 187.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.75 : 282.80 = 135.63 : x
  2. Step 2: Convert to fraction form
    204.75/282.80 = 135.63/x
  3. Step 3: Cross multiply
    204.75x = 282.80 × 135.63
  4. Step 4: Simplify right side
    204.75x = 38,355.49
  5. Step 5: Solve for x
    x = 38,355.49/204.75
  6. Step 6: Final answer
    x = 187.33

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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.