Home / 262.80-394-108.64

Finding the Fourth Proportional to 262.80, 394 and 108.64

Calculator

Solution

The fourth proportional to 262.80, 394 and 108.64 is: 162.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.80 : 394 = 108.64 : x
  2. Step 2: Convert to fraction form
    262.80/394 = 108.64/x
  3. Step 3: Cross multiply
    262.80x = 394 × 108.64
  4. Step 4: Simplify right side
    262.80x = 42,804.16
  5. Step 5: Solve for x
    x = 42,804.16/262.80
  6. Step 6: Final answer
    x = 162.88

Related Problems

Find fourth proportional to 131.40, 197 and 54.32
Half scale
Find fourth proportional to 525.60, 788 and 217.28
Double scale
Find fourth proportional to 263.80, 395.50 and 109.64
Similar ratio
Find fourth proportional to 394.20, 591 and 162.96
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.