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Finding the Fourth Proportional to 331.37, 455.11 and 276.02

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Solution

The fourth proportional to 331.37, 455.11 and 276.02 is: 379.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.37 : 455.11 = 276.02 : x
  2. Step 2: Convert to fraction form
    331.37/455.11 = 276.02/x
  3. Step 3: Cross multiply
    331.37x = 455.11 × 276.02
  4. Step 4: Simplify right side
    331.37x = 125,619.46
  5. Step 5: Solve for x
    x = 125,619.46/331.37
  6. Step 6: Final answer
    x = 379.09

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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.