Home / 415,930-643,756

Finding the Third Proportional to 415,930 and 643,756

Calculator

Solution

The third proportional to 415,930 and 643,756 is: 996,373.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,930 : 643,756 = 643,756 : x
  2. Step 2: Convert to fraction form
    415,930/643,756 = 643,756/x
  3. Step 3: Cross multiply
    415,930x = 643,756 × 643,756
  4. Step 4: Simplify right side
    415,930x = 414,421,787,536
  5. Step 5: Solve for x
    x = 414,421,787,536/415,930
  6. Step 6: Final answer
    x = 996,373.88

Related Problems

Find third proportional to 207,965 and 321,878
Half scale
Find third proportional to 831,860 and 1,287,512
Double scale
Find third proportional to 415,932 and 643,759
Similar ratio
Find third proportional to 623,895 and 965,634
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.