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Finding the Fourth Proportional to 3,229.88, 4,845.69 and 921.38

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Solution

The fourth proportional to 3,229.88, 4,845.69 and 921.38 is: 1,382.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,229.88 : 4,845.69 = 921.38 : x
  2. Step 2: Convert to fraction form
    3,229.88/4,845.69 = 921.38/x
  3. Step 3: Cross multiply
    3,229.88x = 4,845.69 × 921.38
  4. Step 4: Simplify right side
    3,229.88x = 4,464,697.62
  5. Step 5: Solve for x
    x = 4,464,697.62/3,229.88
  6. Step 6: Final answer
    x = 1,382.31

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1.5x scale

Why These Related Problems?

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