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Finding the Fourth Proportional to 388.42, 582.37 and 330.41

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Solution

The fourth proportional to 388.42, 582.37 and 330.41 is: 495.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.42 : 582.37 = 330.41 : x
  2. Step 2: Convert to fraction form
    388.42/582.37 = 330.41/x
  3. Step 3: Cross multiply
    388.42x = 582.37 × 330.41
  4. Step 4: Simplify right side
    388.42x = 192,420.87
  5. Step 5: Solve for x
    x = 192,420.87/388.42
  6. Step 6: Final answer
    x = 495.39

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