Home / 311,640-662,160

Finding the Third Proportional to 311,640 and 662,160

Calculator

Solution

The third proportional to 311,640 and 662,160 is: 1,406,930.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,640 : 662,160 = 662,160 : x
  2. Step 2: Convert to fraction form
    311,640/662,160 = 662,160/x
  3. Step 3: Cross multiply
    311,640x = 662,160 × 662,160
  4. Step 4: Simplify right side
    311,640x = 438,455,865,600
  5. Step 5: Solve for x
    x = 438,455,865,600/311,640
  6. Step 6: Final answer
    x = 1,406,930.64

Related Problems

Find third proportional to 155,820 and 331,080
Half scale
Find third proportional to 623,280 and 1,324,320
Double scale
Find third proportional to 311,642 and 662,164
Similar ratio
Find third proportional to 467,460 and 993,240
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.