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Finding the Fourth Proportional to 361.80, 498.60 and 268.20

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Solution

The fourth proportional to 361.80, 498.60 and 268.20 is: 369.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.80 : 498.60 = 268.20 : x
  2. Step 2: Convert to fraction form
    361.80/498.60 = 268.20/x
  3. Step 3: Cross multiply
    361.80x = 498.60 × 268.20
  4. Step 4: Simplify right side
    361.80x = 133,724.52
  5. Step 5: Solve for x
    x = 133,724.52/361.80
  6. Step 6: Final answer
    x = 369.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.