Home / 647,690-905,720

Finding the Third Proportional to 647,690 and 905,720

Calculator

Solution

The third proportional to 647,690 and 905,720 is: 1,266,545.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,690 : 905,720 = 905,720 : x
  2. Step 2: Convert to fraction form
    647,690/905,720 = 905,720/x
  3. Step 3: Cross multiply
    647,690x = 905,720 × 905,720
  4. Step 4: Simplify right side
    647,690x = 820,328,718,400
  5. Step 5: Solve for x
    x = 820,328,718,400/647,690
  6. Step 6: Final answer
    x = 1,266,545.29

Related Problems

Find third proportional to 323,845 and 452,860
Half scale
Find third proportional to 1,295,380 and 1,811,440
Double scale
Find third proportional to 647,692 and 905,723
Similar ratio
Find third proportional to 971,535 and 1,358,580
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.