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Finding the Fourth Proportional to 639.04, 958.65 and 273.84

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Solution

The fourth proportional to 639.04, 958.65 and 273.84 is: 410.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.04 : 958.65 = 273.84 : x
  2. Step 2: Convert to fraction form
    639.04/958.65 = 273.84/x
  3. Step 3: Cross multiply
    639.04x = 958.65 × 273.84
  4. Step 4: Simplify right side
    639.04x = 262,516.72
  5. Step 5: Solve for x
    x = 262,516.72/639.04
  6. Step 6: Final answer
    x = 410.80

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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.