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Finding the Fourth Proportional to 361.03, 543.39 and 270.21

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Solution

The fourth proportional to 361.03, 543.39 and 270.21 is: 406.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.03 : 543.39 = 270.21 : x
  2. Step 2: Convert to fraction form
    361.03/543.39 = 270.21/x
  3. Step 3: Cross multiply
    361.03x = 543.39 × 270.21
  4. Step 4: Simplify right side
    361.03x = 146,829.41
  5. Step 5: Solve for x
    x = 146,829.41/361.03
  6. Step 6: Final answer
    x = 406.70

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.