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Finding the Fourth Proportional to 361.26, 542.43 and 355.86

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Solution

The fourth proportional to 361.26, 542.43 and 355.86 is: 534.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.26 : 542.43 = 355.86 : x
  2. Step 2: Convert to fraction form
    361.26/542.43 = 355.86/x
  3. Step 3: Cross multiply
    361.26x = 542.43 × 355.86
  4. Step 4: Simplify right side
    361.26x = 193,029.14
  5. Step 5: Solve for x
    x = 193,029.14/361.26
  6. Step 6: Final answer
    x = 534.32

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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.