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Finding the Fourth Proportional to 361.59, 542.54 and 217.31

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Solution

The fourth proportional to 361.59, 542.54 and 217.31 is: 326.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.59 : 542.54 = 217.31 : x
  2. Step 2: Convert to fraction form
    361.59/542.54 = 217.31/x
  3. Step 3: Cross multiply
    361.59x = 542.54 × 217.31
  4. Step 4: Simplify right side
    361.59x = 117,899.37
  5. Step 5: Solve for x
    x = 117,899.37/361.59
  6. Step 6: Final answer
    x = 326.06

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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.