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Finding the Fourth Proportional to 441.91, 662.91 and 440.11

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Solution

The fourth proportional to 441.91, 662.91 and 440.11 is: 660.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.91 : 662.91 = 440.11 : x
  2. Step 2: Convert to fraction form
    441.91/662.91 = 440.11/x
  3. Step 3: Cross multiply
    441.91x = 662.91 × 440.11
  4. Step 4: Simplify right side
    441.91x = 291,753.32
  5. Step 5: Solve for x
    x = 291,753.32/441.91
  6. Step 6: Final answer
    x = 660.21

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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.