Home / 420,669-912,315

Finding the Third Proportional to 420,669 and 912,315

Calculator

Solution

The third proportional to 420,669 and 912,315 is: 1,978,559.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,669 : 912,315 = 912,315 : x
  2. Step 2: Convert to fraction form
    420,669/912,315 = 912,315/x
  3. Step 3: Cross multiply
    420,669x = 912,315 × 912,315
  4. Step 4: Simplify right side
    420,669x = 832,318,659,225
  5. Step 5: Solve for x
    x = 832,318,659,225/420,669
  6. Step 6: Final answer
    x = 1,978,559.53

Related Problems

Find third proportional to 210,334.50 and 456,157.50
Half scale
Find third proportional to 841,338 and 1,824,630
Double scale
Find third proportional to 420,671 and 912,319
Similar ratio
Find third proportional to 631,003.50 and 1,368,472.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.