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Finding the Fourth Proportional to 331.11, 455.05 and 272.00

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Solution

The fourth proportional to 331.11, 455.05 and 272.00 is: 373.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.11 : 455.05 = 272.00 : x
  2. Step 2: Convert to fraction form
    331.11/455.05 = 272.00/x
  3. Step 3: Cross multiply
    331.11x = 455.05 × 272.00
  4. Step 4: Simplify right side
    331.11x = 123,773.80
  5. Step 5: Solve for x
    x = 123,773.80/331.11
  6. Step 6: Final answer
    x = 373.81

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.