Home / 443,218.50-645,421.50

Finding the Third Proportional to 443,218.50 and 645,421.50

Calculator

Solution

The third proportional to 443,218.50 and 645,421.50 is: 939,872.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,218.50 : 645,421.50 = 645,421.50 : x
  2. Step 2: Convert to fraction form
    443,218.50/645,421.50 = 645,421.50/x
  3. Step 3: Cross multiply
    443,218.50x = 645,421.50 × 645,421.50
  4. Step 4: Simplify right side
    443,218.50x = 416,568,912,662.25
  5. Step 5: Solve for x
    x = 416,568,912,662.25/443,218.50
  6. Step 6: Final answer
    x = 939,872.57

Related Problems

Find third proportional to 221,609.25 and 322,710.75
Half scale
Find third proportional to 886,437 and 1,290,843
Double scale
Find third proportional to 443,221 and 645,424
Similar ratio
Find third proportional to 664,827.75 and 968,132.25
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.