Home / 552.40-760.80-550.78

Finding the Fourth Proportional to 552.40, 760.80 and 550.78

Calculator

Solution

The fourth proportional to 552.40, 760.80 and 550.78 is: 758.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.40 : 760.80 = 550.78 : x
  2. Step 2: Convert to fraction form
    552.40/760.80 = 550.78/x
  3. Step 3: Cross multiply
    552.40x = 760.80 × 550.78
  4. Step 4: Simplify right side
    552.40x = 419,033.42
  5. Step 5: Solve for x
    x = 419,033.42/552.40
  6. Step 6: Final answer
    x = 758.57

Related Problems

Find fourth proportional to 276.20, 380.40 and 275.39
Half scale
Find fourth proportional to 1,104.80, 1,521.60 and 1,101.56
Double scale
Find fourth proportional to 553.40, 762.18 and 551.78
Similar ratio
Find fourth proportional to 828.60, 1,141.20 and 826.17
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.