Home / 478,215-668,654

Finding the Third Proportional to 478,215 and 668,654

Calculator

Solution

The third proportional to 478,215 and 668,654 is: 934,931.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,215 : 668,654 = 668,654 : x
  2. Step 2: Convert to fraction form
    478,215/668,654 = 668,654/x
  3. Step 3: Cross multiply
    478,215x = 668,654 × 668,654
  4. Step 4: Simplify right side
    478,215x = 447,098,171,716
  5. Step 5: Solve for x
    x = 447,098,171,716/478,215
  6. Step 6: Final answer
    x = 934,931.30

Related Problems

Find third proportional to 239,107.50 and 334,327
Half scale
Find third proportional to 956,430 and 1,337,308
Double scale
Find third proportional to 478,217 and 668,657
Similar ratio
Find third proportional to 717,322.50 and 1,002,981
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.