Home / 345.35-518.22-128.94

Finding the Fourth Proportional to 345.35, 518.22 and 128.94

Calculator

Solution

The fourth proportional to 345.35, 518.22 and 128.94 is: 193.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.35 : 518.22 = 128.94 : x
  2. Step 2: Convert to fraction form
    345.35/518.22 = 128.94/x
  3. Step 3: Cross multiply
    345.35x = 518.22 × 128.94
  4. Step 4: Simplify right side
    345.35x = 66,819.29
  5. Step 5: Solve for x
    x = 66,819.29/345.35
  6. Step 6: Final answer
    x = 193.48

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.