Home / 310,884-645,138

Finding the Third Proportional to 310,884 and 645,138

Calculator

Solution

The third proportional to 310,884 and 645,138 is: 1,338,772.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,884 : 645,138 = 645,138 : x
  2. Step 2: Convert to fraction form
    310,884/645,138 = 645,138/x
  3. Step 3: Cross multiply
    310,884x = 645,138 × 645,138
  4. Step 4: Simplify right side
    310,884x = 416,203,039,044
  5. Step 5: Solve for x
    x = 416,203,039,044/310,884
  6. Step 6: Final answer
    x = 1,338,772.79

Related Problems

Find third proportional to 155,442 and 322,569
Half scale
Find third proportional to 621,768 and 1,290,276
Double scale
Find third proportional to 310,886 and 645,142
Similar ratio
Find third proportional to 466,326 and 967,707
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.