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Finding the Fourth Proportional to 2,811.54, 4,217.32 and 863.73

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Solution

The fourth proportional to 2,811.54, 4,217.32 and 863.73 is: 1,295.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.54 : 4,217.32 = 863.73 : x
  2. Step 2: Convert to fraction form
    2,811.54/4,217.32 = 863.73/x
  3. Step 3: Cross multiply
    2,811.54x = 4,217.32 × 863.73
  4. Step 4: Simplify right side
    2,811.54x = 3,642,623.64
  5. Step 5: Solve for x
    x = 3,642,623.64/2,811.54
  6. Step 6: Final answer
    x = 1,295.60

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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.