Home / 1,643.28-2,268-980.52

Finding the Fourth Proportional to 1,643.28, 2,268 and 980.52

Calculator

Solution

The fourth proportional to 1,643.28, 2,268 and 980.52 is: 1,353.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.28 : 2,268 = 980.52 : x
  2. Step 2: Convert to fraction form
    1,643.28/2,268 = 980.52/x
  3. Step 3: Cross multiply
    1,643.28x = 2,268 × 980.52
  4. Step 4: Simplify right side
    1,643.28x = 2,223,819.36
  5. Step 5: Solve for x
    x = 2,223,819.36/1,643.28
  6. Step 6: Final answer
    x = 1,353.28

Related Problems

Find fourth proportional to 821.64, 1,134 and 490.26
Half scale
Find fourth proportional to 3,286.56, 4,536 and 1,961.04
Double scale
Find fourth proportional to 1,644.28, 2,269.38 and 981.52
Similar ratio
Find fourth proportional to 2,464.92, 3,402 and 1,470.78
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.