Home / 310,903-645,178

Finding the Third Proportional to 310,903 and 645,178

Calculator

Solution

The third proportional to 310,903 and 645,178 is: 1,338,856.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,903 : 645,178 = 645,178 : x
  2. Step 2: Convert to fraction form
    310,903/645,178 = 645,178/x
  3. Step 3: Cross multiply
    310,903x = 645,178 × 645,178
  4. Step 4: Simplify right side
    310,903x = 416,254,651,684
  5. Step 5: Solve for x
    x = 416,254,651,684/310,903
  6. Step 6: Final answer
    x = 1,338,856.98

Related Problems

Find third proportional to 155,451.50 and 322,589
Half scale
Find third proportional to 621,806 and 1,290,356
Double scale
Find third proportional to 310,905 and 645,182
Similar ratio
Find third proportional to 466,354.50 and 967,767
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.