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Finding the Fourth Proportional to 639.38, 882.17 and 373.73

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Solution

The fourth proportional to 639.38, 882.17 and 373.73 is: 515.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.38 : 882.17 = 373.73 : x
  2. Step 2: Convert to fraction form
    639.38/882.17 = 373.73/x
  3. Step 3: Cross multiply
    639.38x = 882.17 × 373.73
  4. Step 4: Simplify right side
    639.38x = 329,687.11
  5. Step 5: Solve for x
    x = 329,687.11/639.38
  6. Step 6: Final answer
    x = 515.64

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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.