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Finding the Fourth Proportional to 361.12, 541.15 and 155.39

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Solution

The fourth proportional to 361.12, 541.15 and 155.39 is: 232.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.12 : 541.15 = 155.39 : x
  2. Step 2: Convert to fraction form
    361.12/541.15 = 155.39/x
  3. Step 3: Cross multiply
    361.12x = 541.15 × 155.39
  4. Step 4: Simplify right side
    361.12x = 84,090.26
  5. Step 5: Solve for x
    x = 84,090.26/361.12
  6. Step 6: Final answer
    x = 232.86

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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.