Home / 420,881-631,808

Finding the Third Proportional to 420,881 and 631,808

Calculator

Solution

The third proportional to 420,881 and 631,808 is: 948,442.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,881 : 631,808 = 631,808 : x
  2. Step 2: Convert to fraction form
    420,881/631,808 = 631,808/x
  3. Step 3: Cross multiply
    420,881x = 631,808 × 631,808
  4. Step 4: Simplify right side
    420,881x = 399,181,348,864
  5. Step 5: Solve for x
    x = 399,181,348,864/420,881
  6. Step 6: Final answer
    x = 948,442.31

Related Problems

Find third proportional to 210,440.50 and 315,904
Half scale
Find third proportional to 841,762 and 1,263,616
Double scale
Find third proportional to 420,883 and 631,811
Similar ratio
Find third proportional to 631,321.50 and 947,712
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.