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Finding the Fourth Proportional to 149.27, 207.38 and 147.79

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Solution

The fourth proportional to 149.27, 207.38 and 147.79 is: 205.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.27 : 207.38 = 147.79 : x
  2. Step 2: Convert to fraction form
    149.27/207.38 = 147.79/x
  3. Step 3: Cross multiply
    149.27x = 207.38 × 147.79
  4. Step 4: Simplify right side
    149.27x = 30,647.65
  5. Step 5: Solve for x
    x = 30,647.65/149.27
  6. Step 6: Final answer
    x = 205.32

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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.