Home / 988-1,480-825.16

Finding the Fourth Proportional to 988, 1,480 and 825.16

Calculator

Solution

The fourth proportional to 988, 1,480 and 825.16 is: 1,236.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    988 : 1,480 = 825.16 : x
  2. Step 2: Convert to fraction form
    988/1,480 = 825.16/x
  3. Step 3: Cross multiply
    988x = 1,480 × 825.16
  4. Step 4: Simplify right side
    988x = 1,221,236.80
  5. Step 5: Solve for x
    x = 1,221,236.80/988
  6. Step 6: Final answer
    x = 1,236.07

Related Problems

Find fourth proportional to 494, 740 and 412.58
Half scale
Find fourth proportional to 1,976, 2,960 and 1,650.32
Double scale
Find fourth proportional to 989, 1,481.50 and 826.16
Similar ratio
Find fourth proportional to 1,482, 2,220 and 1,237.74
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.