Home / 862.98-1,188-779.84

Finding the Fourth Proportional to 862.98, 1,188 and 779.84

Calculator

Solution

The fourth proportional to 862.98, 1,188 and 779.84 is: 1,073.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.98 : 1,188 = 779.84 : x
  2. Step 2: Convert to fraction form
    862.98/1,188 = 779.84/x
  3. Step 3: Cross multiply
    862.98x = 1,188 × 779.84
  4. Step 4: Simplify right side
    862.98x = 926,443.98
  5. Step 5: Solve for x
    x = 926,443.98/862.98
  6. Step 6: Final answer
    x = 1,073.54

Related Problems

Find fourth proportional to 431.49, 594 and 389.92
Half scale
Find fourth proportional to 1,725.96, 2,376 and 1,559.67
Double scale
Find fourth proportional to 863.98, 1,189.38 and 780.84
Similar ratio
Find fourth proportional to 1,294.47, 1,782 and 1,169.75
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.