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Finding the Fourth Proportional to 361.96, 541.58 and 215.17

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Solution

The fourth proportional to 361.96, 541.58 and 215.17 is: 321.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.96 : 541.58 = 215.17 : x
  2. Step 2: Convert to fraction form
    361.96/541.58 = 215.17/x
  3. Step 3: Cross multiply
    361.96x = 541.58 × 215.17
  4. Step 4: Simplify right side
    361.96x = 116,529.34
  5. Step 5: Solve for x
    x = 116,529.34/361.96
  6. Step 6: Final answer
    x = 321.94

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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.