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Finding the Fourth Proportional to 441.21, 608.78 and 266.55

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Solution

The fourth proportional to 441.21, 608.78 and 266.55 is: 367.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.21 : 608.78 = 266.55 : x
  2. Step 2: Convert to fraction form
    441.21/608.78 = 266.55/x
  3. Step 3: Cross multiply
    441.21x = 608.78 × 266.55
  4. Step 4: Simplify right side
    441.21x = 162,270.31
  5. Step 5: Solve for x
    x = 162,270.31/441.21
  6. Step 6: Final answer
    x = 367.78

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Why These Related Problems?

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