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Finding the Fourth Proportional to 636.40, 954.48 and 271.22

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Solution

The fourth proportional to 636.40, 954.48 and 271.22 is: 406.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.40 : 954.48 = 271.22 : x
  2. Step 2: Convert to fraction form
    636.40/954.48 = 271.22/x
  3. Step 3: Cross multiply
    636.40x = 954.48 × 271.22
  4. Step 4: Simplify right side
    636.40x = 258,874.07
  5. Step 5: Solve for x
    x = 258,874.07/636.40
  6. Step 6: Final answer
    x = 406.78

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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.