Home / 399,312-867,636

Finding the Third Proportional to 399,312 and 867,636

Calculator

Solution

The third proportional to 399,312 and 867,636 is: 1,885,223.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,312 : 867,636 = 867,636 : x
  2. Step 2: Convert to fraction form
    399,312/867,636 = 867,636/x
  3. Step 3: Cross multiply
    399,312x = 867,636 × 867,636
  4. Step 4: Simplify right side
    399,312x = 752,792,228,496
  5. Step 5: Solve for x
    x = 752,792,228,496/399,312
  6. Step 6: Final answer
    x = 1,885,223.16

Related Problems

Find third proportional to 199,656 and 433,818
Half scale
Find third proportional to 798,624 and 1,735,272
Double scale
Find third proportional to 399,314 and 867,640
Similar ratio
Find third proportional to 598,968 and 1,301,454
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.