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Finding the Fourth Proportional to 639.32, 882.27 and 377.33

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Solution

The fourth proportional to 639.32, 882.27 and 377.33 is: 520.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.32 : 882.27 = 377.33 : x
  2. Step 2: Convert to fraction form
    639.32/882.27 = 377.33/x
  3. Step 3: Cross multiply
    639.32x = 882.27 × 377.33
  4. Step 4: Simplify right side
    639.32x = 332,906.94
  5. Step 5: Solve for x
    x = 332,906.94/639.32
  6. Step 6: Final answer
    x = 520.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.