Home / 1,226.88-1,840-456.96

Finding the Fourth Proportional to 1,226.88, 1,840 and 456.96

Calculator

Solution

The fourth proportional to 1,226.88, 1,840 and 456.96 is: 685.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.88 : 1,840 = 456.96 : x
  2. Step 2: Convert to fraction form
    1,226.88/1,840 = 456.96/x
  3. Step 3: Cross multiply
    1,226.88x = 1,840 × 456.96
  4. Step 4: Simplify right side
    1,226.88x = 840,806.40
  5. Step 5: Solve for x
    x = 840,806.40/1,226.88
  6. Step 6: Final answer
    x = 685.32

Related Problems

Find fourth proportional to 613.44, 920 and 228.48
Half scale
Find fourth proportional to 2,453.76, 3,680 and 913.92
Double scale
Find fourth proportional to 1,227.88, 1,841.50 and 457.96
Similar ratio
Find fourth proportional to 1,840.32, 2,760 and 685.44
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.