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Finding the Fourth Proportional to 441.55, 661.80 and 268.11

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Solution

The fourth proportional to 441.55, 661.80 and 268.11 is: 401.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.55 : 661.80 = 268.11 : x
  2. Step 2: Convert to fraction form
    441.55/661.80 = 268.11/x
  3. Step 3: Cross multiply
    441.55x = 661.80 × 268.11
  4. Step 4: Simplify right side
    441.55x = 177,436.20
  5. Step 5: Solve for x
    x = 177,436.20/441.55
  6. Step 6: Final answer
    x = 401.85

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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.