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Finding the Fourth Proportional to 551.97, 756.21 and 531.22

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Solution

The fourth proportional to 551.97, 756.21 and 531.22 is: 727.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.97 : 756.21 = 531.22 : x
  2. Step 2: Convert to fraction form
    551.97/756.21 = 531.22/x
  3. Step 3: Cross multiply
    551.97x = 756.21 × 531.22
  4. Step 4: Simplify right side
    551.97x = 401,707.44
  5. Step 5: Solve for x
    x = 401,707.44/551.97
  6. Step 6: Final answer
    x = 727.77

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.