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Finding the Fourth Proportional to 298.90, 447.81 and 144.73

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Solution

The fourth proportional to 298.90, 447.81 and 144.73 is: 216.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.90 : 447.81 = 144.73 : x
  2. Step 2: Convert to fraction form
    298.90/447.81 = 144.73/x
  3. Step 3: Cross multiply
    298.90x = 447.81 × 144.73
  4. Step 4: Simplify right side
    298.90x = 64,811.54
  5. Step 5: Solve for x
    x = 64,811.54/298.90
  6. Step 6: Final answer
    x = 216.83

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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.