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Finding the Fourth Proportional to 551.20, 825.52 and 379.68

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Solution

The fourth proportional to 551.20, 825.52 and 379.68 is: 568.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.20 : 825.52 = 379.68 : x
  2. Step 2: Convert to fraction form
    551.20/825.52 = 379.68/x
  3. Step 3: Cross multiply
    551.20x = 825.52 × 379.68
  4. Step 4: Simplify right side
    551.20x = 313,433.43
  5. Step 5: Solve for x
    x = 313,433.43/551.20
  6. Step 6: Final answer
    x = 568.64

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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.