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Finding the Fourth Proportional to 361.11, 541.23 and 206.74

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Solution

The fourth proportional to 361.11, 541.23 and 206.74 is: 309.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.11 : 541.23 = 206.74 : x
  2. Step 2: Convert to fraction form
    361.11/541.23 = 206.74/x
  3. Step 3: Cross multiply
    361.11x = 541.23 × 206.74
  4. Step 4: Simplify right side
    361.11x = 111,893.89
  5. Step 5: Solve for x
    x = 111,893.89/361.11
  6. Step 6: Final answer
    x = 309.86

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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.