Home / 332.14-498.24-139.78

Finding the Fourth Proportional to 332.14, 498.24 and 139.78

Calculator

Solution

The fourth proportional to 332.14, 498.24 and 139.78 is: 209.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    332.14 : 498.24 = 139.78 : x
  2. Step 2: Convert to fraction form
    332.14/498.24 = 139.78/x
  3. Step 3: Cross multiply
    332.14x = 498.24 × 139.78
  4. Step 4: Simplify right side
    332.14x = 69,643.99
  5. Step 5: Solve for x
    x = 69,643.99/332.14
  6. Step 6: Final answer
    x = 209.68

Related Problems

Find fourth proportional to 166.07, 249.12 and 69.89
Half scale
Find fourth proportional to 664.28, 996.48 and 279.56
Double scale
Find fourth proportional to 333.14, 499.74 and 140.78
Similar ratio
Find fourth proportional to 498.21, 747.36 and 209.67
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.