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Finding the Fourth Proportional to 660.36, 990.99 and 441.27

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Solution

The fourth proportional to 660.36, 990.99 and 441.27 is: 662.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.36 : 990.99 = 441.27 : x
  2. Step 2: Convert to fraction form
    660.36/990.99 = 441.27/x
  3. Step 3: Cross multiply
    660.36x = 990.99 × 441.27
  4. Step 4: Simplify right side
    660.36x = 437,294.16
  5. Step 5: Solve for x
    x = 437,294.16/660.36
  6. Step 6: Final answer
    x = 662.21

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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.