Home / 852.20-1,176-479.20

Finding the Fourth Proportional to 852.20, 1,176 and 479.20

Calculator

Solution

The fourth proportional to 852.20, 1,176 and 479.20 is: 661.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.20 : 1,176 = 479.20 : x
  2. Step 2: Convert to fraction form
    852.20/1,176 = 479.20/x
  3. Step 3: Cross multiply
    852.20x = 1,176 × 479.20
  4. Step 4: Simplify right side
    852.20x = 563,539.20
  5. Step 5: Solve for x
    x = 563,539.20/852.20
  6. Step 6: Final answer
    x = 661.28

Related Problems

Find fourth proportional to 426.10, 588 and 239.60
Half scale
Find fourth proportional to 1,704.40, 2,352 and 958.40
Double scale
Find fourth proportional to 853.20, 1,177.38 and 480.20
Similar ratio
Find fourth proportional to 1,278.30, 1,764 and 718.80
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.