Home / 756.87-1,135.31-209.05

Finding the Fourth Proportional to 756.87, 1,135.31 and 209.05

Calculator

Solution

The fourth proportional to 756.87, 1,135.31 and 209.05 is: 313.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.87 : 1,135.31 = 209.05 : x
  2. Step 2: Convert to fraction form
    756.87/1,135.31 = 209.05/x
  3. Step 3: Cross multiply
    756.87x = 1,135.31 × 209.05
  4. Step 4: Simplify right side
    756.87x = 237,336.56
  5. Step 5: Solve for x
    x = 237,336.56/756.87
  6. Step 6: Final answer
    x = 313.58

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.