Home / 1,382.76-2,074.06-613

Finding the Fourth Proportional to 1,382.76, 2,074.06 and 613

Calculator

Solution

The fourth proportional to 1,382.76, 2,074.06 and 613 is: 919.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,382.76 : 2,074.06 = 613 : x
  2. Step 2: Convert to fraction form
    1,382.76/2,074.06 = 613/x
  3. Step 3: Cross multiply
    1,382.76x = 2,074.06 × 613
  4. Step 4: Simplify right side
    1,382.76x = 1,271,398.78
  5. Step 5: Solve for x
    x = 1,271,398.78/1,382.76
  6. Step 6: Final answer
    x = 919.46

Related Problems

Find fourth proportional to 691.38, 1,037.03 and 306.50
Half scale
Find fourth proportional to 2,765.52, 4,148.12 and 1,226
Double scale
Find fourth proportional to 1,383.76, 2,075.56 and 614
Similar ratio
Find fourth proportional to 2,074.14, 3,111.09 and 919.50
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.