Home / 1,939.17-2,909.04-640.35

Finding the Fourth Proportional to 1,939.17, 2,909.04 and 640.35

Calculator

Solution

The fourth proportional to 1,939.17, 2,909.04 and 640.35 is: 960.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.17 : 2,909.04 = 640.35 : x
  2. Step 2: Convert to fraction form
    1,939.17/2,909.04 = 640.35/x
  3. Step 3: Cross multiply
    1,939.17x = 2,909.04 × 640.35
  4. Step 4: Simplify right side
    1,939.17x = 1,862,803.76
  5. Step 5: Solve for x
    x = 1,862,803.76/1,939.17
  6. Step 6: Final answer
    x = 960.62

Related Problems

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.