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Finding the Fourth Proportional to 248.09, 342.38 and 149.85

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Solution

The fourth proportional to 248.09, 342.38 and 149.85 is: 206.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.09 : 342.38 = 149.85 : x
  2. Step 2: Convert to fraction form
    248.09/342.38 = 149.85/x
  3. Step 3: Cross multiply
    248.09x = 342.38 × 149.85
  4. Step 4: Simplify right side
    248.09x = 51,306.02
  5. Step 5: Solve for x
    x = 51,306.02/248.09
  6. Step 6: Final answer
    x = 206.81

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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.