Home / 1,323.85-1,986-502.78

Finding the Fourth Proportional to 1,323.85, 1,986 and 502.78

Calculator

Solution

The fourth proportional to 1,323.85, 1,986 and 502.78 is: 754.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323.85 : 1,986 = 502.78 : x
  2. Step 2: Convert to fraction form
    1,323.85/1,986 = 502.78/x
  3. Step 3: Cross multiply
    1,323.85x = 1,986 × 502.78
  4. Step 4: Simplify right side
    1,323.85x = 998,521.08
  5. Step 5: Solve for x
    x = 998,521.08/1,323.85
  6. Step 6: Final answer
    x = 754.26

Related Problems

Find fourth proportional to 661.93, 993 and 251.39
Half scale
Find fourth proportional to 2,647.70, 3,972 and 1,005.56
Double scale
Find fourth proportional to 1,324.85, 1,987.50 and 503.78
Similar ratio
Find fourth proportional to 1,985.78, 2,979 and 754.17
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.