Home / 962.89-1,328.64-830.28

Finding the Fourth Proportional to 962.89, 1,328.64 and 830.28

Calculator

Solution

The fourth proportional to 962.89, 1,328.64 and 830.28 is: 1,145.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.89 : 1,328.64 = 830.28 : x
  2. Step 2: Convert to fraction form
    962.89/1,328.64 = 830.28/x
  3. Step 3: Cross multiply
    962.89x = 1,328.64 × 830.28
  4. Step 4: Simplify right side
    962.89x = 1,103,145.09
  5. Step 5: Solve for x
    x = 1,103,145.09/962.89
  6. Step 6: Final answer
    x = 1,145.66

Related Problems

Find fourth proportional to 481.44, 664.32 and 415.14
Half scale
Find fourth proportional to 1,925.78, 2,657.27 and 1,660.57
Double scale
Find fourth proportional to 963.89, 1,330.02 and 831.28
Similar ratio
Find fourth proportional to 1,444.33, 1,992.95 and 1,245.43
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.