Home / 520.70-777.20-459.20

Finding the Fourth Proportional to 520.70, 777.20 and 459.20

Calculator

Solution

The fourth proportional to 520.70, 777.20 and 459.20 is: 685.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.70 : 777.20 = 459.20 : x
  2. Step 2: Convert to fraction form
    520.70/777.20 = 459.20/x
  3. Step 3: Cross multiply
    520.70x = 777.20 × 459.20
  4. Step 4: Simplify right side
    520.70x = 356,889.89
  5. Step 5: Solve for x
    x = 356,889.89/520.70
  6. Step 6: Final answer
    x = 685.41

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.