Home / 930.84-1,286.22-668.40

Finding the Fourth Proportional to 930.84, 1,286.22 and 668.40

Calculator

Solution

The fourth proportional to 930.84, 1,286.22 and 668.40 is: 923.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.84 : 1,286.22 = 668.40 : x
  2. Step 2: Convert to fraction form
    930.84/1,286.22 = 668.40/x
  3. Step 3: Cross multiply
    930.84x = 1,286.22 × 668.40
  4. Step 4: Simplify right side
    930.84x = 859,709.45
  5. Step 5: Solve for x
    x = 859,709.45/930.84
  6. Step 6: Final answer
    x = 923.58

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.