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Finding the Fourth Proportional to 204.75, 306.63 and 189

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Solution

The fourth proportional to 204.75, 306.63 and 189 is: 283.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.75 : 306.63 = 189 : x
  2. Step 2: Convert to fraction form
    204.75/306.63 = 189/x
  3. Step 3: Cross multiply
    204.75x = 306.63 × 189
  4. Step 4: Simplify right side
    204.75x = 57,953.07
  5. Step 5: Solve for x
    x = 57,953.07/204.75
  6. Step 6: Final answer
    x = 283.04

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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.