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Finding the Fourth Proportional to 271.51, 407.40 and 127.23

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Solution

The fourth proportional to 271.51, 407.40 and 127.23 is: 190.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.51 : 407.40 = 127.23 : x
  2. Step 2: Convert to fraction form
    271.51/407.40 = 127.23/x
  3. Step 3: Cross multiply
    271.51x = 407.40 × 127.23
  4. Step 4: Simplify right side
    271.51x = 51,833.50
  5. Step 5: Solve for x
    x = 51,833.50/271.51
  6. Step 6: Final answer
    x = 190.91

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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.