Home / 724.94-1,087.43-313.79

Finding the Fourth Proportional to 724.94, 1,087.43 and 313.79

Calculator

Solution

The fourth proportional to 724.94, 1,087.43 and 313.79 is: 470.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.94 : 1,087.43 = 313.79 : x
  2. Step 2: Convert to fraction form
    724.94/1,087.43 = 313.79/x
  3. Step 3: Cross multiply
    724.94x = 1,087.43 × 313.79
  4. Step 4: Simplify right side
    724.94x = 341,217.65
  5. Step 5: Solve for x
    x = 341,217.65/724.94
  6. Step 6: Final answer
    x = 470.69

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.