Home / 1,780-2,670-754

Finding the Fourth Proportional to 1,780, 2,670 and 754

Calculator

Solution

The fourth proportional to 1,780, 2,670 and 754 is: 1,131

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780 : 2,670 = 754 : x
  2. Step 2: Convert to fraction form
    1,780/2,670 = 754/x
  3. Step 3: Cross multiply
    1,780x = 2,670 × 754
  4. Step 4: Simplify right side
    1,780x = 2,013,180
  5. Step 5: Solve for x
    x = 2,013,180/1,780
  6. Step 6: Final answer
    x = 1,131

Related Problems

Find fourth proportional to 890, 1,335 and 377
Half scale
Find fourth proportional to 3,560, 5,340 and 1,508
Double scale
Find fourth proportional to 1,781, 2,671.50 and 755
Similar ratio
Find fourth proportional to 2,670, 4,005 and 1,131
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.