Home / 390.26-538.77-259.85

Finding the Fourth Proportional to 390.26, 538.77 and 259.85

Calculator

Solution

The fourth proportional to 390.26, 538.77 and 259.85 is: 358.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.26 : 538.77 = 259.85 : x
  2. Step 2: Convert to fraction form
    390.26/538.77 = 259.85/x
  3. Step 3: Cross multiply
    390.26x = 538.77 × 259.85
  4. Step 4: Simplify right side
    390.26x = 139,996.69
  5. Step 5: Solve for x
    x = 139,996.69/390.26
  6. Step 6: Final answer
    x = 358.73

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.