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Finding the Fourth Proportional to 3,229.96, 4,845.18 and 921.64

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Solution

The fourth proportional to 3,229.96, 4,845.18 and 921.64 is: 1,382.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,229.96 : 4,845.18 = 921.64 : x
  2. Step 2: Convert to fraction form
    3,229.96/4,845.18 = 921.64/x
  3. Step 3: Cross multiply
    3,229.96x = 4,845.18 × 921.64
  4. Step 4: Simplify right side
    3,229.96x = 4,465,511.70
  5. Step 5: Solve for x
    x = 4,465,511.70/3,229.96
  6. Step 6: Final answer
    x = 1,382.53

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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.