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Finding the Fourth Proportional to 2,811.58, 4,217.37 and 863.77

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Solution

The fourth proportional to 2,811.58, 4,217.37 and 863.77 is: 1,295.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.58 : 4,217.37 = 863.77 : x
  2. Step 2: Convert to fraction form
    2,811.58/4,217.37 = 863.77/x
  3. Step 3: Cross multiply
    2,811.58x = 4,217.37 × 863.77
  4. Step 4: Simplify right side
    2,811.58x = 3,642,837.68
  5. Step 5: Solve for x
    x = 3,642,837.68/2,811.58
  6. Step 6: Final answer
    x = 1,295.66

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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.