Home / 1,689.21-2,331-943.13

Finding the Fourth Proportional to 1,689.21, 2,331 and 943.13

Calculator

Solution

The fourth proportional to 1,689.21, 2,331 and 943.13 is: 1,301.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.21 : 2,331 = 943.13 : x
  2. Step 2: Convert to fraction form
    1,689.21/2,331 = 943.13/x
  3. Step 3: Cross multiply
    1,689.21x = 2,331 × 943.13
  4. Step 4: Simplify right side
    1,689.21x = 2,198,441.86
  5. Step 5: Solve for x
    x = 2,198,441.86/1,689.21
  6. Step 6: Final answer
    x = 1,301.46

Related Problems

Find fourth proportional to 844.61, 1,165.50 and 471.57
Half scale
Find fourth proportional to 3,378.42, 4,662 and 1,886.27
Double scale
Find fourth proportional to 1,690.21, 2,332.38 and 944.13
Similar ratio
Find fourth proportional to 2,533.82, 3,496.50 and 1,414.70
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.