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Finding the Fourth Proportional to 441.76, 661.20 and 404.80

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Solution

The fourth proportional to 441.76, 661.20 and 404.80 is: 605.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.76 : 661.20 = 404.80 : x
  2. Step 2: Convert to fraction form
    441.76/661.20 = 404.80/x
  3. Step 3: Cross multiply
    441.76x = 661.20 × 404.80
  4. Step 4: Simplify right side
    441.76x = 267,653.76
  5. Step 5: Solve for x
    x = 267,653.76/441.76
  6. Step 6: Final answer
    x = 605.88

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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.