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Finding the Fourth Proportional to 206.49, 284.81 and 144.39

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Solution

The fourth proportional to 206.49, 284.81 and 144.39 is: 199.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.49 : 284.81 = 144.39 : x
  2. Step 2: Convert to fraction form
    206.49/284.81 = 144.39/x
  3. Step 3: Cross multiply
    206.49x = 284.81 × 144.39
  4. Step 4: Simplify right side
    206.49x = 41,122.99
  5. Step 5: Solve for x
    x = 41,122.99/206.49
  6. Step 6: Final answer
    x = 199.15

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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.