Home / 209.64-312.72-194.79

Finding the Fourth Proportional to 209.64, 312.72 and 194.79

Calculator

Solution

The fourth proportional to 209.64, 312.72 and 194.79 is: 290.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.64 : 312.72 = 194.79 : x
  2. Step 2: Convert to fraction form
    209.64/312.72 = 194.79/x
  3. Step 3: Cross multiply
    209.64x = 312.72 × 194.79
  4. Step 4: Simplify right side
    209.64x = 60,914.73
  5. Step 5: Solve for x
    x = 60,914.73/209.64
  6. Step 6: Final answer
    x = 290.57

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.