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Finding the Fourth Proportional to 183.80, 276.30 and 149.78

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Solution

The fourth proportional to 183.80, 276.30 and 149.78 is: 225.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.80 : 276.30 = 149.78 : x
  2. Step 2: Convert to fraction form
    183.80/276.30 = 149.78/x
  3. Step 3: Cross multiply
    183.80x = 276.30 × 149.78
  4. Step 4: Simplify right side
    183.80x = 41,382.83
  5. Step 5: Solve for x
    x = 41,382.83/183.80
  6. Step 6: Final answer
    x = 225.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.