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Finding the Fourth Proportional to 483.20, 667.67 and 378.57

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Solution

The fourth proportional to 483.20, 667.67 and 378.57 is: 523.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.20 : 667.67 = 378.57 : x
  2. Step 2: Convert to fraction form
    483.20/667.67 = 378.57/x
  3. Step 3: Cross multiply
    483.20x = 667.67 × 378.57
  4. Step 4: Simplify right side
    483.20x = 252,759.83
  5. Step 5: Solve for x
    x = 252,759.83/483.20
  6. Step 6: Final answer
    x = 523.10

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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.