Home / 786.57-1,085.55-455.07

Finding the Fourth Proportional to 786.57, 1,085.55 and 455.07

Calculator

Solution

The fourth proportional to 786.57, 1,085.55 and 455.07 is: 628.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    786.57 : 1,085.55 = 455.07 : x
  2. Step 2: Convert to fraction form
    786.57/1,085.55 = 455.07/x
  3. Step 3: Cross multiply
    786.57x = 1,085.55 × 455.07
  4. Step 4: Simplify right side
    786.57x = 494,001.24
  5. Step 5: Solve for x
    x = 494,001.24/786.57
  6. Step 6: Final answer
    x = 628.04

Related Problems

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.