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Finding the Fourth Proportional to 149.73, 207.83 and 143.79

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Solution

The fourth proportional to 149.73, 207.83 and 143.79 is: 199.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.73 : 207.83 = 143.79 : x
  2. Step 2: Convert to fraction form
    149.73/207.83 = 143.79/x
  3. Step 3: Cross multiply
    149.73x = 207.83 × 143.79
  4. Step 4: Simplify right side
    149.73x = 29,883.16
  5. Step 5: Solve for x
    x = 29,883.16/149.73
  6. Step 6: Final answer
    x = 199.58

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.