Home / 784-1,081.92-434.69

Finding the Fourth Proportional to 784, 1,081.92 and 434.69

Calculator

Solution

The fourth proportional to 784, 1,081.92 and 434.69 is: 599.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    784 : 1,081.92 = 434.69 : x
  2. Step 2: Convert to fraction form
    784/1,081.92 = 434.69/x
  3. Step 3: Cross multiply
    784x = 1,081.92 × 434.69
  4. Step 4: Simplify right side
    784x = 470,299.80
  5. Step 5: Solve for x
    x = 470,299.80/784
  6. Step 6: Final answer
    x = 599.87

Related Problems

Find fourth proportional to 392, 540.96 and 217.35
Half scale
Find fourth proportional to 1,568, 2,163.84 and 869.38
Double scale
Find fourth proportional to 785, 1,083.30 and 435.69
Similar ratio
Find fourth proportional to 1,176, 1,622.88 and 652.04
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.