Home / 390,057,910-812,400,799

Finding the Third Proportional to 390,057,910 and 812,400,799

Calculator

Solution

The third proportional to 390,057,910 and 812,400,799 is: 1,692,043,774.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,057,910 : 812,400,799 = 812,400,799 : x
  2. Step 2: Convert to fraction form
    390,057,910/812,400,799 = 812,400,799/x
  3. Step 3: Cross multiply
    390,057,910x = 812,400,799 × 812,400,799
  4. Step 4: Simplify right side
    390,057,910x = 659,995,058,215,838,464
  5. Step 5: Solve for x
    x = 659,995,058,215,838,464/390,057,910
  6. Step 6: Final answer
    x = 1,692,043,774.26

Related Problems

Find third proportional to 195,028,955 and 406,200,399.50
Half scale
Find third proportional to 780,115,820 and 1,624,801,598
Double scale
Find third proportional to 390,057,912 and 812,400,803
Similar ratio
Find third proportional to 585,086,865 and 1,218,601,198.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.