Home / 1,585.28-2,378-431.04

Finding the Fourth Proportional to 1,585.28, 2,378 and 431.04

Calculator

Solution

The fourth proportional to 1,585.28, 2,378 and 431.04 is: 646.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.28 : 2,378 = 431.04 : x
  2. Step 2: Convert to fraction form
    1,585.28/2,378 = 431.04/x
  3. Step 3: Cross multiply
    1,585.28x = 2,378 × 431.04
  4. Step 4: Simplify right side
    1,585.28x = 1,025,013.12
  5. Step 5: Solve for x
    x = 1,025,013.12/1,585.28
  6. Step 6: Final answer
    x = 646.58

Related Problems

Find fourth proportional to 792.64, 1,189 and 215.52
Half scale
Find fourth proportional to 3,170.56, 4,756 and 862.08
Double scale
Find fourth proportional to 1,586.28, 2,379.50 and 432.04
Similar ratio
Find fourth proportional to 2,377.92, 3,567 and 646.56
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.