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Finding the Fourth Proportional to 551.33, 826.22 and 427.36

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Solution

The fourth proportional to 551.33, 826.22 and 427.36 is: 640.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.33 : 826.22 = 427.36 : x
  2. Step 2: Convert to fraction form
    551.33/826.22 = 427.36/x
  3. Step 3: Cross multiply
    551.33x = 826.22 × 427.36
  4. Step 4: Simplify right side
    551.33x = 353,093.38
  5. Step 5: Solve for x
    x = 353,093.38/551.33
  6. Step 6: Final answer
    x = 640.44

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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.