Home / 388,409-830,788

Finding the Third Proportional to 388,409 and 830,788

Calculator

Solution

The third proportional to 388,409 and 830,788 is: 1,777,015.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,409 : 830,788 = 830,788 : x
  2. Step 2: Convert to fraction form
    388,409/830,788 = 830,788/x
  3. Step 3: Cross multiply
    388,409x = 830,788 × 830,788
  4. Step 4: Simplify right side
    388,409x = 690,208,700,944
  5. Step 5: Solve for x
    x = 690,208,700,944/388,409
  6. Step 6: Final answer
    x = 1,777,015.21

Related Problems

Find third proportional to 194,204.50 and 415,394
Half scale
Find third proportional to 776,818 and 1,661,576
Double scale
Find third proportional to 388,411 and 830,792
Similar ratio
Find third proportional to 582,613.50 and 1,246,182
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.