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Finding the Fourth Proportional to 2,766.49, 4,149.74 and 818.54

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Solution

The fourth proportional to 2,766.49, 4,149.74 and 818.54 is: 1,227.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,766.49 : 4,149.74 = 818.54 : x
  2. Step 2: Convert to fraction form
    2,766.49/4,149.74 = 818.54/x
  3. Step 3: Cross multiply
    2,766.49x = 4,149.74 × 818.54
  4. Step 4: Simplify right side
    2,766.49x = 3,396,728.18
  5. Step 5: Solve for x
    x = 3,396,728.18/2,766.49
  6. Step 6: Final answer
    x = 1,227.81

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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.