Home / 863.87-1,296-452.79

Finding the Fourth Proportional to 863.87, 1,296 and 452.79

Calculator

Solution

The fourth proportional to 863.87, 1,296 and 452.79 is: 679.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.87 : 1,296 = 452.79 : x
  2. Step 2: Convert to fraction form
    863.87/1,296 = 452.79/x
  3. Step 3: Cross multiply
    863.87x = 1,296 × 452.79
  4. Step 4: Simplify right side
    863.87x = 586,815.84
  5. Step 5: Solve for x
    x = 586,815.84/863.87
  6. Step 6: Final answer
    x = 679.29

Related Problems

Find fourth proportional to 431.93, 648 and 226.40
Half scale
Find fourth proportional to 1,727.73, 2,592 and 905.58
Double scale
Find fourth proportional to 864.87, 1,297.50 and 453.79
Similar ratio
Find fourth proportional to 1,295.80, 1,944 and 679.19
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.