Home / 320.48-479.80-212.05

Finding the Fourth Proportional to 320.48, 479.80 and 212.05

Calculator

Solution

The fourth proportional to 320.48, 479.80 and 212.05 is: 317.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.48 : 479.80 = 212.05 : x
  2. Step 2: Convert to fraction form
    320.48/479.80 = 212.05/x
  3. Step 3: Cross multiply
    320.48x = 479.80 × 212.05
  4. Step 4: Simplify right side
    320.48x = 101,738.13
  5. Step 5: Solve for x
    x = 101,738.13/320.48
  6. Step 6: Final answer
    x = 317.46

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.