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Finding the Fourth Proportional to 638.88, 958.31 and 182.88

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Solution

The fourth proportional to 638.88, 958.31 and 182.88 is: 274.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.88 : 958.31 = 182.88 : x
  2. Step 2: Convert to fraction form
    638.88/958.31 = 182.88/x
  3. Step 3: Cross multiply
    638.88x = 958.31 × 182.88
  4. Step 4: Simplify right side
    638.88x = 175,251.40
  5. Step 5: Solve for x
    x = 175,251.40/638.88
  6. Step 6: Final answer
    x = 274.31

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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.