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Finding the Fourth Proportional to 273.56, 407.43 and 272.21

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Solution

The fourth proportional to 273.56, 407.43 and 272.21 is: 405.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.56 : 407.43 = 272.21 : x
  2. Step 2: Convert to fraction form
    273.56/407.43 = 272.21/x
  3. Step 3: Cross multiply
    273.56x = 407.43 × 272.21
  4. Step 4: Simplify right side
    273.56x = 110,904.48
  5. Step 5: Solve for x
    x = 110,904.48/273.56
  6. Step 6: Final answer
    x = 405.42

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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.