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Finding the Fourth Proportional to 298.32, 447 and 216.78

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Solution

The fourth proportional to 298.32, 447 and 216.78 is: 324.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.32 : 447 = 216.78 : x
  2. Step 2: Convert to fraction form
    298.32/447 = 216.78/x
  3. Step 3: Cross multiply
    298.32x = 447 × 216.78
  4. Step 4: Simplify right side
    298.32x = 96,900.66
  5. Step 5: Solve for x
    x = 96,900.66/298.32
  6. Step 6: Final answer
    x = 324.82

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