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Finding the Fourth Proportional to 1,108.21, 1,662.16 and 441.11

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Solution

The fourth proportional to 1,108.21, 1,662.16 and 441.11 is: 661.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108.21 : 1,662.16 = 441.11 : x
  2. Step 2: Convert to fraction form
    1,108.21/1,662.16 = 441.11/x
  3. Step 3: Cross multiply
    1,108.21x = 1,662.16 × 441.11
  4. Step 4: Simplify right side
    1,108.21x = 733,188.69
  5. Step 5: Solve for x
    x = 733,188.69/1,108.21
  6. Step 6: Final answer
    x = 661.60

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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.