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Finding the Fourth Proportional to 206.93, 285.39 and 144.74

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Solution

The fourth proportional to 206.93, 285.39 and 144.74 is: 199.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.93 : 285.39 = 144.74 : x
  2. Step 2: Convert to fraction form
    206.93/285.39 = 144.74/x
  3. Step 3: Cross multiply
    206.93x = 285.39 × 144.74
  4. Step 4: Simplify right side
    206.93x = 41,308.06
  5. Step 5: Solve for x
    x = 41,308.06/206.93
  6. Step 6: Final answer
    x = 199.62

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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.