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Finding the Fourth Proportional to 376.38, 518.59 and 281.46

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Solution

The fourth proportional to 376.38, 518.59 and 281.46 is: 387.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.38 : 518.59 = 281.46 : x
  2. Step 2: Convert to fraction form
    376.38/518.59 = 281.46/x
  3. Step 3: Cross multiply
    376.38x = 518.59 × 281.46
  4. Step 4: Simplify right side
    376.38x = 145,960.14
  5. Step 5: Solve for x
    x = 145,960.14/376.38
  6. Step 6: Final answer
    x = 387.80

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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.