Home / 418.72-628.80-274.48

Finding the Fourth Proportional to 418.72, 628.80 and 274.48

Calculator

Solution

The fourth proportional to 418.72, 628.80 and 274.48 is: 412.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.72 : 628.80 = 274.48 : x
  2. Step 2: Convert to fraction form
    418.72/628.80 = 274.48/x
  3. Step 3: Cross multiply
    418.72x = 628.80 × 274.48
  4. Step 4: Simplify right side
    418.72x = 172,593.02
  5. Step 5: Solve for x
    x = 172,593.02/418.72
  6. Step 6: Final answer
    x = 412.19

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.