Home / 330,578-678,580

Finding the Third Proportional to 330,578 and 678,580

Calculator

Solution

The third proportional to 330,578 and 678,580 is: 1,392,926.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,578 : 678,580 = 678,580 : x
  2. Step 2: Convert to fraction form
    330,578/678,580 = 678,580/x
  3. Step 3: Cross multiply
    330,578x = 678,580 × 678,580
  4. Step 4: Simplify right side
    330,578x = 460,470,816,400
  5. Step 5: Solve for x
    x = 460,470,816,400/330,578
  6. Step 6: Final answer
    x = 1,392,926.38

Related Problems

Find third proportional to 165,289 and 339,290
Half scale
Find third proportional to 661,156 and 1,357,160
Double scale
Find third proportional to 330,580 and 678,584
Similar ratio
Find third proportional to 495,867 and 1,017,870
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.