Home / 309,904-478,872

Finding the Third Proportional to 309,904 and 478,872

Calculator

Solution

The third proportional to 309,904 and 478,872 is: 739,965.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,904 : 478,872 = 478,872 : x
  2. Step 2: Convert to fraction form
    309,904/478,872 = 478,872/x
  3. Step 3: Cross multiply
    309,904x = 478,872 × 478,872
  4. Step 4: Simplify right side
    309,904x = 229,318,392,384
  5. Step 5: Solve for x
    x = 229,318,392,384/309,904
  6. Step 6: Final answer
    x = 739,965.90

Related Problems

Find third proportional to 154,952 and 239,436
Half scale
Find third proportional to 619,808 and 957,744
Double scale
Find third proportional to 309,906 and 478,875
Similar ratio
Find third proportional to 464,856 and 718,308
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.