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Finding the Fourth Proportional to 638.81, 958.22 and 273.39

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Solution

The fourth proportional to 638.81, 958.22 and 273.39 is: 410.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.81 : 958.22 = 273.39 : x
  2. Step 2: Convert to fraction form
    638.81/958.22 = 273.39/x
  3. Step 3: Cross multiply
    638.81x = 958.22 × 273.39
  4. Step 4: Simplify right side
    638.81x = 261,966.40
  5. Step 5: Solve for x
    x = 261,966.40/638.81
  6. Step 6: Final answer
    x = 410.09

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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.