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Finding the Fourth Proportional to 271.21, 407.13 and 127.21

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Solution

The fourth proportional to 271.21, 407.13 and 127.21 is: 190.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.21 : 407.13 = 127.21 : x
  2. Step 2: Convert to fraction form
    271.21/407.13 = 127.21/x
  3. Step 3: Cross multiply
    271.21x = 407.13 × 127.21
  4. Step 4: Simplify right side
    271.21x = 51,791.01
  5. Step 5: Solve for x
    x = 51,791.01/271.21
  6. Step 6: Final answer
    x = 190.96

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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.