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Finding the Fourth Proportional to 298.98, 447.78 and 273.15

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Solution

The fourth proportional to 298.98, 447.78 and 273.15 is: 409.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.98 : 447.78 = 273.15 : x
  2. Step 2: Convert to fraction form
    298.98/447.78 = 273.15/x
  3. Step 3: Cross multiply
    298.98x = 447.78 × 273.15
  4. Step 4: Simplify right side
    298.98x = 122,311.11
  5. Step 5: Solve for x
    x = 122,311.11/298.98
  6. Step 6: Final answer
    x = 409.09

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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.