Home / 518.79-715.80-353.09

Finding the Fourth Proportional to 518.79, 715.80 and 353.09

Calculator

Solution

The fourth proportional to 518.79, 715.80 and 353.09 is: 487.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.79 : 715.80 = 353.09 : x
  2. Step 2: Convert to fraction form
    518.79/715.80 = 353.09/x
  3. Step 3: Cross multiply
    518.79x = 715.80 × 353.09
  4. Step 4: Simplify right side
    518.79x = 252,744.94
  5. Step 5: Solve for x
    x = 252,744.94/518.79
  6. Step 6: Final answer
    x = 487.18

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.