Home / 1,806.21-2,491.83-1,275.21

Finding the Fourth Proportional to 1,806.21, 2,491.83 and 1,275.21

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Solution

The fourth proportional to 1,806.21, 2,491.83 and 1,275.21 is: 1,759.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,806.21 : 2,491.83 = 1,275.21 : x
  2. Step 2: Convert to fraction form
    1,806.21/2,491.83 = 1,275.21/x
  3. Step 3: Cross multiply
    1,806.21x = 2,491.83 × 1,275.21
  4. Step 4: Simplify right side
    1,806.21x = 3,177,606.53
  5. Step 5: Solve for x
    x = 3,177,606.53/1,806.21
  6. Step 6: Final answer
    x = 1,759.27

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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.