Home / 413.25-570.29-378.39

Finding the Fourth Proportional to 413.25, 570.29 and 378.39

Calculator

Solution

The fourth proportional to 413.25, 570.29 and 378.39 is: 522.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.25 : 570.29 = 378.39 : x
  2. Step 2: Convert to fraction form
    413.25/570.29 = 378.39/x
  3. Step 3: Cross multiply
    413.25x = 570.29 × 378.39
  4. Step 4: Simplify right side
    413.25x = 215,790.14
  5. Step 5: Solve for x
    x = 215,790.14/413.25
  6. Step 6: Final answer
    x = 522.18

Related Problems

Find fourth proportional to 206.63, 285.14 and 189.20
Half scale
Find fourth proportional to 826.50, 1,140.57 and 756.78
Double scale
Find fourth proportional to 414.25, 571.67 and 379.39
Similar ratio
Find fourth proportional to 619.88, 855.43 and 567.59
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.