Home / 1,360.93-1,878-771.45

Finding the Fourth Proportional to 1,360.93, 1,878 and 771.45

Calculator

Solution

The fourth proportional to 1,360.93, 1,878 and 771.45 is: 1,064.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,360.93 : 1,878 = 771.45 : x
  2. Step 2: Convert to fraction form
    1,360.93/1,878 = 771.45/x
  3. Step 3: Cross multiply
    1,360.93x = 1,878 × 771.45
  4. Step 4: Simplify right side
    1,360.93x = 1,448,783.10
  5. Step 5: Solve for x
    x = 1,448,783.10/1,360.93
  6. Step 6: Final answer
    x = 1,064.56

Related Problems

Find fourth proportional to 680.46, 939 and 385.73
Half scale
Find fourth proportional to 2,721.86, 3,756 and 1,542.90
Double scale
Find fourth proportional to 1,361.93, 1,879.38 and 772.45
Similar ratio
Find fourth proportional to 2,041.39, 2,817 and 1,157.18
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.