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Finding the Fourth Proportional to 639.43, 959.00 and 273.92

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Solution

The fourth proportional to 639.43, 959.00 and 273.92 is: 410.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.43 : 959.00 = 273.92 : x
  2. Step 2: Convert to fraction form
    639.43/959.00 = 273.92/x
  3. Step 3: Cross multiply
    639.43x = 959.00 × 273.92
  4. Step 4: Simplify right side
    639.43x = 262,683.12
  5. Step 5: Solve for x
    x = 262,683.12/639.43
  6. Step 6: Final answer
    x = 410.81

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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.