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Finding the Fourth Proportional to 392.38, 587.25 and 361.80

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Solution

The fourth proportional to 392.38, 587.25 and 361.80 is: 541.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.38 : 587.25 = 361.80 : x
  2. Step 2: Convert to fraction form
    392.38/587.25 = 361.80/x
  3. Step 3: Cross multiply
    392.38x = 587.25 × 361.80
  4. Step 4: Simplify right side
    392.38x = 212,467.05
  5. Step 5: Solve for x
    x = 212,467.05/392.38
  6. Step 6: Final answer
    x = 541.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.