Home / 1,639.20-2,262-940.56

Finding the Fourth Proportional to 1,639.20, 2,262 and 940.56

Calculator

Solution

The fourth proportional to 1,639.20, 2,262 and 940.56 is: 1,297.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.20 : 2,262 = 940.56 : x
  2. Step 2: Convert to fraction form
    1,639.20/2,262 = 940.56/x
  3. Step 3: Cross multiply
    1,639.20x = 2,262 × 940.56
  4. Step 4: Simplify right side
    1,639.20x = 2,127,546.72
  5. Step 5: Solve for x
    x = 2,127,546.72/1,639.20
  6. Step 6: Final answer
    x = 1,297.92

Related Problems

Find fourth proportional to 819.60, 1,131 and 470.28
Half scale
Find fourth proportional to 3,278.40, 4,524 and 1,881.12
Double scale
Find fourth proportional to 1,640.20, 2,263.38 and 941.56
Similar ratio
Find fourth proportional to 2,458.80, 3,393 and 1,410.84
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.