Home / 846.28-1,268.61-268.75

Finding the Fourth Proportional to 846.28, 1,268.61 and 268.75

Calculator

Solution

The fourth proportional to 846.28, 1,268.61 and 268.75 is: 402.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.28 : 1,268.61 = 268.75 : x
  2. Step 2: Convert to fraction form
    846.28/1,268.61 = 268.75/x
  3. Step 3: Cross multiply
    846.28x = 1,268.61 × 268.75
  4. Step 4: Simplify right side
    846.28x = 340,938.94
  5. Step 5: Solve for x
    x = 340,938.94/846.28
  6. Step 6: Final answer
    x = 402.87

Related Problems

Find fourth proportional to 423.14, 634.31 and 134.38
Half scale
Find fourth proportional to 1,692.56, 2,537.22 and 537.50
Double scale
Find fourth proportional to 847.28, 1,270.11 and 269.75
Similar ratio
Find fourth proportional to 1,269.42, 1,902.92 and 403.13
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.