Home / 945.66-1,305-552.75

Finding the Fourth Proportional to 945.66, 1,305 and 552.75

Calculator

Solution

The fourth proportional to 945.66, 1,305 and 552.75 is: 762.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.66 : 1,305 = 552.75 : x
  2. Step 2: Convert to fraction form
    945.66/1,305 = 552.75/x
  3. Step 3: Cross multiply
    945.66x = 1,305 × 552.75
  4. Step 4: Simplify right side
    945.66x = 721,338.75
  5. Step 5: Solve for x
    x = 721,338.75/945.66
  6. Step 6: Final answer
    x = 762.79

Related Problems

Find fourth proportional to 472.83, 652.50 and 276.38
Half scale
Find fourth proportional to 1,891.32, 2,610 and 1,105.50
Double scale
Find fourth proportional to 946.66, 1,306.38 and 553.75
Similar ratio
Find fourth proportional to 1,418.49, 1,957.50 and 829.13
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.