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Finding the Fourth Proportional to 377.12, 518.46 and 374.78

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Solution

The fourth proportional to 377.12, 518.46 and 374.78 is: 515.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.12 : 518.46 = 374.78 : x
  2. Step 2: Convert to fraction form
    377.12/518.46 = 374.78/x
  3. Step 3: Cross multiply
    377.12x = 518.46 × 374.78
  4. Step 4: Simplify right side
    377.12x = 194,308.44
  5. Step 5: Solve for x
    x = 194,308.44/377.12
  6. Step 6: Final answer
    x = 515.24

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.