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Finding the Fourth Proportional to 636.91, 955.12 and 271.51

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Solution

The fourth proportional to 636.91, 955.12 and 271.51 is: 407.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.91 : 955.12 = 271.51 : x
  2. Step 2: Convert to fraction form
    636.91/955.12 = 271.51/x
  3. Step 3: Cross multiply
    636.91x = 955.12 × 271.51
  4. Step 4: Simplify right side
    636.91x = 259,324.63
  5. Step 5: Solve for x
    x = 259,324.63/636.91
  6. Step 6: Final answer
    x = 407.16

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.