Home / 518-771.61-494.72

Finding the Fourth Proportional to 518, 771.61 and 494.72

Calculator

Solution

The fourth proportional to 518, 771.61 and 494.72 is: 736.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    518 : 771.61 = 494.72 : x
  2. Step 2: Convert to fraction form
    518/771.61 = 494.72/x
  3. Step 3: Cross multiply
    518x = 771.61 × 494.72
  4. Step 4: Simplify right side
    518x = 381,730.90
  5. Step 5: Solve for x
    x = 381,730.90/518
  6. Step 6: Final answer
    x = 736.93

Related Problems

Find fourth proportional to 259, 385.81 and 247.36
Half scale
Find fourth proportional to 1,036, 1,543.22 and 989.44
Double scale
Find fourth proportional to 519, 773.10 and 495.72
Similar ratio
Find fourth proportional to 777, 1,157.42 and 742.08
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.