Home / 829.98-1,146-680.38

Finding the Fourth Proportional to 829.98, 1,146 and 680.38

Calculator

Solution

The fourth proportional to 829.98, 1,146 and 680.38 is: 939.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.98 : 1,146 = 680.38 : x
  2. Step 2: Convert to fraction form
    829.98/1,146 = 680.38/x
  3. Step 3: Cross multiply
    829.98x = 1,146 × 680.38
  4. Step 4: Simplify right side
    829.98x = 779,715.48
  5. Step 5: Solve for x
    x = 779,715.48/829.98
  6. Step 6: Final answer
    x = 939.44

Related Problems

Find fourth proportional to 414.99, 573 and 340.19
Half scale
Find fourth proportional to 1,659.96, 2,292 and 1,360.76
Double scale
Find fourth proportional to 830.98, 1,147.38 and 681.38
Similar ratio
Find fourth proportional to 1,244.97, 1,719 and 1,020.57
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.