Home / 315,584-690,136

Finding the Third Proportional to 315,584 and 690,136

Calculator

Solution

The third proportional to 315,584 and 690,136 is: 1,509,226.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,584 : 690,136 = 690,136 : x
  2. Step 2: Convert to fraction form
    315,584/690,136 = 690,136/x
  3. Step 3: Cross multiply
    315,584x = 690,136 × 690,136
  4. Step 4: Simplify right side
    315,584x = 476,287,698,496
  5. Step 5: Solve for x
    x = 476,287,698,496/315,584
  6. Step 6: Final answer
    x = 1,509,226.38

Related Problems

Find third proportional to 157,792 and 345,068
Half scale
Find third proportional to 631,168 and 1,380,272
Double scale
Find third proportional to 315,586 and 690,140
Similar ratio
Find third proportional to 473,376 and 1,035,204
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.