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Finding the Fourth Proportional to 272.56, 405.49 and 271.60

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Solution

The fourth proportional to 272.56, 405.49 and 271.60 is: 404.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.56 : 405.49 = 271.60 : x
  2. Step 2: Convert to fraction form
    272.56/405.49 = 271.60/x
  3. Step 3: Cross multiply
    272.56x = 405.49 × 271.60
  4. Step 4: Simplify right side
    272.56x = 110,131.08
  5. Step 5: Solve for x
    x = 110,131.08/272.56
  6. Step 6: Final answer
    x = 404.06

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.