Home / 420,768-905,688

Finding the Third Proportional to 420,768 and 905,688

Calculator

Solution

The third proportional to 420,768 and 905,688 is: 1,949,460.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,768 : 905,688 = 905,688 : x
  2. Step 2: Convert to fraction form
    420,768/905,688 = 905,688/x
  3. Step 3: Cross multiply
    420,768x = 905,688 × 905,688
  4. Step 4: Simplify right side
    420,768x = 820,270,753,344
  5. Step 5: Solve for x
    x = 820,270,753,344/420,768
  6. Step 6: Final answer
    x = 1,949,460.87

Related Problems

Find third proportional to 210,384 and 452,844
Half scale
Find third proportional to 841,536 and 1,811,376
Double scale
Find third proportional to 420,770 and 905,692
Similar ratio
Find third proportional to 631,152 and 1,358,532
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.