Home / 737.31-1,105.50-390.43

Finding the Fourth Proportional to 737.31, 1,105.50 and 390.43

Calculator

Solution

The fourth proportional to 737.31, 1,105.50 and 390.43 is: 585.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.31 : 1,105.50 = 390.43 : x
  2. Step 2: Convert to fraction form
    737.31/1,105.50 = 390.43/x
  3. Step 3: Cross multiply
    737.31x = 1,105.50 × 390.43
  4. Step 4: Simplify right side
    737.31x = 431,614.84
  5. Step 5: Solve for x
    x = 431,614.84/737.31
  6. Step 6: Final answer
    x = 585.39

Related Problems

Find fourth proportional to 368.66, 552.75 and 195.21
Half scale
Find fourth proportional to 1,474.62, 2,211 and 780.85
Double scale
Find fourth proportional to 738.31, 1,107 and 391.43
Similar ratio
Find fourth proportional to 1,105.97, 1,658.25 and 585.64
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.