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Finding the Fourth Proportional to 298.55, 447.44 and 220.89

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Solution

The fourth proportional to 298.55, 447.44 and 220.89 is: 331.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.55 : 447.44 = 220.89 : x
  2. Step 2: Convert to fraction form
    298.55/447.44 = 220.89/x
  3. Step 3: Cross multiply
    298.55x = 447.44 × 220.89
  4. Step 4: Simplify right side
    298.55x = 98,836.84
  5. Step 5: Solve for x
    x = 98,836.84/298.55
  6. Step 6: Final answer
    x = 331.05

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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.