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Finding the Fourth Proportional to 388.41, 578.44 and 381.59

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Solution

The fourth proportional to 388.41, 578.44 and 381.59 is: 568.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.41 : 578.44 = 381.59 : x
  2. Step 2: Convert to fraction form
    388.41/578.44 = 381.59/x
  3. Step 3: Cross multiply
    388.41x = 578.44 × 381.59
  4. Step 4: Simplify right side
    388.41x = 220,724.98
  5. Step 5: Solve for x
    x = 220,724.98/388.41
  6. Step 6: Final answer
    x = 568.29

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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.