Home / 2,806.72-3,873.28-1,687.67

Finding the Fourth Proportional to 2,806.72, 3,873.28 and 1,687.67

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Solution

The fourth proportional to 2,806.72, 3,873.28 and 1,687.67 is: 2,329.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,806.72 : 3,873.28 = 1,687.67 : x
  2. Step 2: Convert to fraction form
    2,806.72/3,873.28 = 1,687.67/x
  3. Step 3: Cross multiply
    2,806.72x = 3,873.28 × 1,687.67
  4. Step 4: Simplify right side
    2,806.72x = 6,536,831.27
  5. Step 5: Solve for x
    x = 6,536,831.27/2,806.72
  6. Step 6: Final answer
    x = 2,329.00

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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.