Home / 827.24-1,140-679.40

Finding the Fourth Proportional to 827.24, 1,140 and 679.40

Calculator

Solution

The fourth proportional to 827.24, 1,140 and 679.40 is: 936.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.24 : 1,140 = 679.40 : x
  2. Step 2: Convert to fraction form
    827.24/1,140 = 679.40/x
  3. Step 3: Cross multiply
    827.24x = 1,140 × 679.40
  4. Step 4: Simplify right side
    827.24x = 774,516
  5. Step 5: Solve for x
    x = 774,516/827.24
  6. Step 6: Final answer
    x = 936.27

Related Problems

Find fourth proportional to 413.62, 570 and 339.70
Half scale
Find fourth proportional to 1,654.48, 2,280 and 1,358.80
Double scale
Find fourth proportional to 828.24, 1,141.38 and 680.40
Similar ratio
Find fourth proportional to 1,240.86, 1,710 and 1,019.10
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.