Home / 1,806.30-2,708.82-636

Finding the Fourth Proportional to 1,806.30, 2,708.82 and 636

Calculator

Solution

The fourth proportional to 1,806.30, 2,708.82 and 636 is: 953.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,806.30 : 2,708.82 = 636 : x
  2. Step 2: Convert to fraction form
    1,806.30/2,708.82 = 636/x
  3. Step 3: Cross multiply
    1,806.30x = 2,708.82 × 636
  4. Step 4: Simplify right side
    1,806.30x = 1,722,809.52
  5. Step 5: Solve for x
    x = 1,722,809.52/1,806.30
  6. Step 6: Final answer
    x = 953.78

Related Problems

Find fourth proportional to 903.15, 1,354.41 and 318
Half scale
Find fourth proportional to 3,612.60, 5,417.64 and 1,272
Double scale
Find fourth proportional to 1,807.30, 2,710.32 and 637
Similar ratio
Find fourth proportional to 2,709.45, 4,063.23 and 954
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.