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Finding the Fourth Proportional to 822.37, 1,234.27 and 427.33

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Solution

The fourth proportional to 822.37, 1,234.27 and 427.33 is: 641.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.37 : 1,234.27 = 427.33 : x
  2. Step 2: Convert to fraction form
    822.37/1,234.27 = 427.33/x
  3. Step 3: Cross multiply
    822.37x = 1,234.27 × 427.33
  4. Step 4: Simplify right side
    822.37x = 527,440.60
  5. Step 5: Solve for x
    x = 527,440.60/822.37
  6. Step 6: Final answer
    x = 641.37

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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.