Home / 825.28-1,232-765.28

Finding the Fourth Proportional to 825.28, 1,232 and 765.28

Calculator

Solution

The fourth proportional to 825.28, 1,232 and 765.28 is: 1,142.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.28 : 1,232 = 765.28 : x
  2. Step 2: Convert to fraction form
    825.28/1,232 = 765.28/x
  3. Step 3: Cross multiply
    825.28x = 1,232 × 765.28
  4. Step 4: Simplify right side
    825.28x = 942,824.96
  5. Step 5: Solve for x
    x = 942,824.96/825.28
  6. Step 6: Final answer
    x = 1,142.43

Related Problems

Find fourth proportional to 412.64, 616 and 382.64
Half scale
Find fourth proportional to 1,650.56, 2,464 and 1,530.56
Double scale
Find fourth proportional to 826.28, 1,233.49 and 766.28
Similar ratio
Find fourth proportional to 1,237.92, 1,848 and 1,147.92
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.