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Finding the Fourth Proportional to 636.99, 955.59 and 271.56

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Solution

The fourth proportional to 636.99, 955.59 and 271.56 is: 407.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.99 : 955.59 = 271.56 : x
  2. Step 2: Convert to fraction form
    636.99/955.59 = 271.56/x
  3. Step 3: Cross multiply
    636.99x = 955.59 × 271.56
  4. Step 4: Simplify right side
    636.99x = 259,500.02
  5. Step 5: Solve for x
    x = 259,500.02/636.99
  6. Step 6: Final answer
    x = 407.38

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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.