Home / 351,816-686,136

Finding the Third Proportional to 351,816 and 686,136

Calculator

Solution

The third proportional to 351,816 and 686,136 is: 1,338,150.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,816 : 686,136 = 686,136 : x
  2. Step 2: Convert to fraction form
    351,816/686,136 = 686,136/x
  3. Step 3: Cross multiply
    351,816x = 686,136 × 686,136
  4. Step 4: Simplify right side
    351,816x = 470,782,610,496
  5. Step 5: Solve for x
    x = 470,782,610,496/351,816
  6. Step 6: Final answer
    x = 1,338,150.09

Related Problems

Find third proportional to 175,908 and 343,068
Half scale
Find third proportional to 703,632 and 1,372,272
Double scale
Find third proportional to 351,818 and 686,140
Similar ratio
Find third proportional to 527,724 and 1,029,204
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.