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Finding the Fourth Proportional to 298.49, 447.26 and 255.56

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Solution

The fourth proportional to 298.49, 447.26 and 255.56 is: 382.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.49 : 447.26 = 255.56 : x
  2. Step 2: Convert to fraction form
    298.49/447.26 = 255.56/x
  3. Step 3: Cross multiply
    298.49x = 447.26 × 255.56
  4. Step 4: Simplify right side
    298.49x = 114,298.25
  5. Step 5: Solve for x
    x = 114,298.25/298.49
  6. Step 6: Final answer
    x = 382.93

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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.