Home / 515.50-711.72-404.75

Finding the Fourth Proportional to 515.50, 711.72 and 404.75

Calculator

Solution

The fourth proportional to 515.50, 711.72 and 404.75 is: 558.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.50 : 711.72 = 404.75 : x
  2. Step 2: Convert to fraction form
    515.50/711.72 = 404.75/x
  3. Step 3: Cross multiply
    515.50x = 711.72 × 404.75
  4. Step 4: Simplify right side
    515.50x = 288,070.45
  5. Step 5: Solve for x
    x = 288,070.45/515.50
  6. Step 6: Final answer
    x = 558.82

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.