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Finding the Fourth Proportional to 361.43, 538.41 and 339.02

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Solution

The fourth proportional to 361.43, 538.41 and 339.02 is: 505.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.43 : 538.41 = 339.02 : x
  2. Step 2: Convert to fraction form
    361.43/538.41 = 339.02/x
  3. Step 3: Cross multiply
    361.43x = 538.41 × 339.02
  4. Step 4: Simplify right side
    361.43x = 182,529.56
  5. Step 5: Solve for x
    x = 182,529.56/361.43
  6. Step 6: Final answer
    x = 505.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.