Home / 2,806.80-3,880.44-2,688.72

Finding the Fourth Proportional to 2,806.80, 3,880.44 and 2,688.72

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Solution

The fourth proportional to 2,806.80, 3,880.44 and 2,688.72 is: 3,717.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,806.80 : 3,880.44 = 2,688.72 : x
  2. Step 2: Convert to fraction form
    2,806.80/3,880.44 = 2,688.72/x
  3. Step 3: Cross multiply
    2,806.80x = 3,880.44 × 2,688.72
  4. Step 4: Simplify right side
    2,806.80x = 10,433,416.64
  5. Step 5: Solve for x
    x = 10,433,416.64/2,806.80
  6. Step 6: Final answer
    x = 3,717.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.