Home / 263.12-394.08-139.77

Finding the Fourth Proportional to 263.12, 394.08 and 139.77

Calculator

Solution

The fourth proportional to 263.12, 394.08 and 139.77 is: 209.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.12 : 394.08 = 139.77 : x
  2. Step 2: Convert to fraction form
    263.12/394.08 = 139.77/x
  3. Step 3: Cross multiply
    263.12x = 394.08 × 139.77
  4. Step 4: Simplify right side
    263.12x = 55,080.56
  5. Step 5: Solve for x
    x = 55,080.56/263.12
  6. Step 6: Final answer
    x = 209.34

Related Problems

Find fourth proportional to 131.56, 197.04 and 69.89
Half scale
Find fourth proportional to 526.23, 788.16 and 279.54
Double scale
Find fourth proportional to 264.12, 395.58 and 140.77
Similar ratio
Find fourth proportional to 394.67, 591.12 and 209.66
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.