Home / 1,180.75-1,778-874.78

Finding the Fourth Proportional to 1,180.75, 1,778 and 874.78

Calculator

Solution

The fourth proportional to 1,180.75, 1,778 and 874.78 is: 1,317.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.75 : 1,778 = 874.78 : x
  2. Step 2: Convert to fraction form
    1,180.75/1,778 = 874.78/x
  3. Step 3: Cross multiply
    1,180.75x = 1,778 × 874.78
  4. Step 4: Simplify right side
    1,180.75x = 1,555,358.84
  5. Step 5: Solve for x
    x = 1,555,358.84/1,180.75
  6. Step 6: Final answer
    x = 1,317.26

Related Problems

Find fourth proportional to 590.38, 889 and 437.39
Half scale
Find fourth proportional to 2,361.50, 3,556 and 1,749.56
Double scale
Find fourth proportional to 1,181.75, 1,779.51 and 875.78
Similar ratio
Find fourth proportional to 1,771.13, 2,667 and 1,312.17
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.