Home / 1,139.36-1,709.14-489.94

Finding the Fourth Proportional to 1,139.36, 1,709.14 and 489.94

Calculator

Solution

The fourth proportional to 1,139.36, 1,709.14 and 489.94 is: 734.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139.36 : 1,709.14 = 489.94 : x
  2. Step 2: Convert to fraction form
    1,139.36/1,709.14 = 489.94/x
  3. Step 3: Cross multiply
    1,139.36x = 1,709.14 × 489.94
  4. Step 4: Simplify right side
    1,139.36x = 837,376.05
  5. Step 5: Solve for x
    x = 837,376.05/1,139.36
  6. Step 6: Final answer
    x = 734.95

Related Problems

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.