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Finding the Fourth Proportional to 205.84, 284 and 143.84

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Solution

The fourth proportional to 205.84, 284 and 143.84 is: 198.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.84 : 284 = 143.84 : x
  2. Step 2: Convert to fraction form
    205.84/284 = 143.84/x
  3. Step 3: Cross multiply
    205.84x = 284 × 143.84
  4. Step 4: Simplify right side
    205.84x = 40,850.56
  5. Step 5: Solve for x
    x = 40,850.56/205.84
  6. Step 6: Final answer
    x = 198.46

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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.