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Finding the Fourth Proportional to 636.85, 955.55 and 271.81

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Solution

The fourth proportional to 636.85, 955.55 and 271.81 is: 407.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.85 : 955.55 = 271.81 : x
  2. Step 2: Convert to fraction form
    636.85/955.55 = 271.81/x
  3. Step 3: Cross multiply
    636.85x = 955.55 × 271.81
  4. Step 4: Simplify right side
    636.85x = 259,728.05
  5. Step 5: Solve for x
    x = 259,728.05/636.85
  6. Step 6: Final answer
    x = 407.83

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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.