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Finding the Fourth Proportional to 206.00, 284.12 and 143.80

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Solution

The fourth proportional to 206.00, 284.12 and 143.80 is: 198.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.00 : 284.12 = 143.80 : x
  2. Step 2: Convert to fraction form
    206.00/284.12 = 143.80/x
  3. Step 3: Cross multiply
    206.00x = 284.12 × 143.80
  4. Step 4: Simplify right side
    206.00x = 40,855.03
  5. Step 5: Solve for x
    x = 40,855.03/206.00
  6. Step 6: Final answer
    x = 198.33

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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.