Home / 1,728.88-2,386-983.08

Finding the Fourth Proportional to 1,728.88, 2,386 and 983.08

Calculator

Solution

The fourth proportional to 1,728.88, 2,386 and 983.08 is: 1,356.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.88 : 2,386 = 983.08 : x
  2. Step 2: Convert to fraction form
    1,728.88/2,386 = 983.08/x
  3. Step 3: Cross multiply
    1,728.88x = 2,386 × 983.08
  4. Step 4: Simplify right side
    1,728.88x = 2,345,628.88
  5. Step 5: Solve for x
    x = 2,345,628.88/1,728.88
  6. Step 6: Final answer
    x = 1,356.73

Related Problems

Find fourth proportional to 864.44, 1,193 and 491.54
Half scale
Find fourth proportional to 3,457.76, 4,772 and 1,966.16
Double scale
Find fourth proportional to 1,729.88, 2,387.38 and 984.08
Similar ratio
Find fourth proportional to 2,593.32, 3,579 and 1,474.62
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.