Home / 1,805.88-2,490.91-1,281

Finding the Fourth Proportional to 1,805.88, 2,490.91 and 1,281

Calculator

Solution

The fourth proportional to 1,805.88, 2,490.91 and 1,281 is: 1,766.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.88 : 2,490.91 = 1,281 : x
  2. Step 2: Convert to fraction form
    1,805.88/2,490.91 = 1,281/x
  3. Step 3: Cross multiply
    1,805.88x = 2,490.91 × 1,281
  4. Step 4: Simplify right side
    1,805.88x = 3,190,855.71
  5. Step 5: Solve for x
    x = 3,190,855.71/1,805.88
  6. Step 6: Final answer
    x = 1,766.93

Related Problems

Find fourth proportional to 902.94, 1,245.46 and 640.50
Half scale
Find fourth proportional to 3,611.76, 4,981.82 and 2,562
Double scale
Find fourth proportional to 1,806.88, 2,492.29 and 1,282
Similar ratio
Find fourth proportional to 2,708.82, 3,736.37 and 1,921.50
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.