Home / 399.80-619.95

Finding the Third Proportional to 399.80 and 619.95

Calculator

Solution

The third proportional to 399.80 and 619.95 is: 961.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.80 : 619.95 = 619.95 : x
  2. Step 2: Convert to fraction form
    399.80/619.95 = 619.95/x
  3. Step 3: Cross multiply
    399.80x = 619.95 × 619.95
  4. Step 4: Simplify right side
    399.80x = 384,332.19
  5. Step 5: Solve for x
    x = 384,332.19/399.80
  6. Step 6: Final answer
    x = 961.32

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.