Home / 2,111.68-3,166.88-631

Finding the Fourth Proportional to 2,111.68, 3,166.88 and 631

Calculator

Solution

The fourth proportional to 2,111.68, 3,166.88 and 631 is: 946.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,111.68 : 3,166.88 = 631 : x
  2. Step 2: Convert to fraction form
    2,111.68/3,166.88 = 631/x
  3. Step 3: Cross multiply
    2,111.68x = 3,166.88 × 631
  4. Step 4: Simplify right side
    2,111.68x = 1,998,301.28
  5. Step 5: Solve for x
    x = 1,998,301.28/2,111.68
  6. Step 6: Final answer
    x = 946.31

Related Problems

Find fourth proportional to 1,055.84, 1,583.44 and 315.50
Half scale
Find fourth proportional to 4,223.36, 6,333.76 and 1,262
Double scale
Find fourth proportional to 2,112.68, 3,168.38 and 632
Similar ratio
Find fourth proportional to 3,167.52, 4,750.32 and 946.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.