Home / 297.87-411.22-199.80

Finding the Fourth Proportional to 297.87, 411.22 and 199.80

Calculator

Solution

The fourth proportional to 297.87, 411.22 and 199.80 is: 275.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.87 : 411.22 = 199.80 : x
  2. Step 2: Convert to fraction form
    297.87/411.22 = 199.80/x
  3. Step 3: Cross multiply
    297.87x = 411.22 × 199.80
  4. Step 4: Simplify right side
    297.87x = 82,159.20
  5. Step 5: Solve for x
    x = 82,159.20/297.87
  6. Step 6: Final answer
    x = 275.82

Related Problems

Find fourth proportional to 148.94, 205.61 and 99.90
Half scale
Find fourth proportional to 595.75, 822.44 and 399.59
Double scale
Find fourth proportional to 298.87, 412.60 and 200.80
Similar ratio
Find fourth proportional to 446.81, 616.83 and 299.69
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.