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Finding the Fourth Proportional to 717.44, 990.48 and 481.73

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Solution

The fourth proportional to 717.44, 990.48 and 481.73 is: 665.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.44 : 990.48 = 481.73 : x
  2. Step 2: Convert to fraction form
    717.44/990.48 = 481.73/x
  3. Step 3: Cross multiply
    717.44x = 990.48 × 481.73
  4. Step 4: Simplify right side
    717.44x = 477,148.21
  5. Step 5: Solve for x
    x = 477,148.21/717.44
  6. Step 6: Final answer
    x = 665.07

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.