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Finding the Fourth Proportional to 361.64, 498.45 and 330.65

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Solution

The fourth proportional to 361.64, 498.45 and 330.65 is: 455.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.64 : 498.45 = 330.65 : x
  2. Step 2: Convert to fraction form
    361.64/498.45 = 330.65/x
  3. Step 3: Cross multiply
    361.64x = 498.45 × 330.65
  4. Step 4: Simplify right side
    361.64x = 164,812.49
  5. Step 5: Solve for x
    x = 164,812.49/361.64
  6. Step 6: Final answer
    x = 455.74

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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.