Home / 1,268.94-1,902-618.96

Finding the Fourth Proportional to 1,268.94, 1,902 and 618.96

Calculator

Solution

The fourth proportional to 1,268.94, 1,902 and 618.96 is: 927.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.94 : 1,902 = 618.96 : x
  2. Step 2: Convert to fraction form
    1,268.94/1,902 = 618.96/x
  3. Step 3: Cross multiply
    1,268.94x = 1,902 × 618.96
  4. Step 4: Simplify right side
    1,268.94x = 1,177,261.92
  5. Step 5: Solve for x
    x = 1,177,261.92/1,268.94
  6. Step 6: Final answer
    x = 927.75

Related Problems

Find fourth proportional to 634.47, 951 and 309.48
Half scale
Find fourth proportional to 2,537.88, 3,804 and 1,237.92
Double scale
Find fourth proportional to 1,269.94, 1,903.50 and 619.96
Similar ratio
Find fourth proportional to 1,903.41, 2,853 and 928.44
1.5x scale

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.