Home / 380,280-816,720

Finding the Third Proportional to 380,280 and 816,720

Calculator

Solution

The third proportional to 380,280 and 816,720 is: 1,754,053.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,280 : 816,720 = 816,720 : x
  2. Step 2: Convert to fraction form
    380,280/816,720 = 816,720/x
  3. Step 3: Cross multiply
    380,280x = 816,720 × 816,720
  4. Step 4: Simplify right side
    380,280x = 667,031,558,400
  5. Step 5: Solve for x
    x = 667,031,558,400/380,280
  6. Step 6: Final answer
    x = 1,754,053.75

Related Problems

Find third proportional to 190,140 and 408,360
Half scale
Find third proportional to 760,560 and 1,633,440
Double scale
Find third proportional to 380,282 and 816,724
Similar ratio
Find third proportional to 570,420 and 1,225,080
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.