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Finding the Fourth Proportional to 427.02, 639.83 and 166.73

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Solution

The fourth proportional to 427.02, 639.83 and 166.73 is: 249.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.02 : 639.83 = 166.73 : x
  2. Step 2: Convert to fraction form
    427.02/639.83 = 166.73/x
  3. Step 3: Cross multiply
    427.02x = 639.83 × 166.73
  4. Step 4: Simplify right side
    427.02x = 106,676.07
  5. Step 5: Solve for x
    x = 106,676.07/427.02
  6. Step 6: Final answer
    x = 249.81

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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.