Home / 259.70-390.09-205.97

Finding the Fourth Proportional to 259.70, 390.09 and 205.97

Calculator

Solution

The fourth proportional to 259.70, 390.09 and 205.97 is: 309.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.70 : 390.09 = 205.97 : x
  2. Step 2: Convert to fraction form
    259.70/390.09 = 205.97/x
  3. Step 3: Cross multiply
    259.70x = 390.09 × 205.97
  4. Step 4: Simplify right side
    259.70x = 80,346.84
  5. Step 5: Solve for x
    x = 80,346.84/259.70
  6. Step 6: Final answer
    x = 309.38

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.