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Finding the Fourth Proportional to 551.72, 825.54 and 331.55

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Solution

The fourth proportional to 551.72, 825.54 and 331.55 is: 496.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.72 : 825.54 = 331.55 : x
  2. Step 2: Convert to fraction form
    551.72/825.54 = 331.55/x
  3. Step 3: Cross multiply
    551.72x = 825.54 × 331.55
  4. Step 4: Simplify right side
    551.72x = 273,707.79
  5. Step 5: Solve for x
    x = 273,707.79/551.72
  6. Step 6: Final answer
    x = 496.10

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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.