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Finding the Fourth Proportional to 361.63, 498.46 and 330.65

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Solution

The fourth proportional to 361.63, 498.46 and 330.65 is: 455.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.63 : 498.46 = 330.65 : x
  2. Step 2: Convert to fraction form
    361.63/498.46 = 330.65/x
  3. Step 3: Cross multiply
    361.63x = 498.46 × 330.65
  4. Step 4: Simplify right side
    361.63x = 164,815.80
  5. Step 5: Solve for x
    x = 164,815.80/361.63
  6. Step 6: Final answer
    x = 455.76

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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.