Home / 2,806.28-3,872.67-1,687.23

Finding the Fourth Proportional to 2,806.28, 3,872.67 and 1,687.23

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Solution

The fourth proportional to 2,806.28, 3,872.67 and 1,687.23 is: 2,328.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,806.28 : 3,872.67 = 1,687.23 : x
  2. Step 2: Convert to fraction form
    2,806.28/3,872.67 = 1,687.23/x
  3. Step 3: Cross multiply
    2,806.28x = 3,872.67 × 1,687.23
  4. Step 4: Simplify right side
    2,806.28x = 6,534,085.00
  5. Step 5: Solve for x
    x = 6,534,085.00/2,806.28
  6. Step 6: Final answer
    x = 2,328.38

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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.