Home / 307,804-640,070

Finding the Third Proportional to 307,804 and 640,070

Calculator

Solution

The third proportional to 307,804 and 640,070 is: 1,331,008.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,804 : 640,070 = 640,070 : x
  2. Step 2: Convert to fraction form
    307,804/640,070 = 640,070/x
  3. Step 3: Cross multiply
    307,804x = 640,070 × 640,070
  4. Step 4: Simplify right side
    307,804x = 409,689,604,900
  5. Step 5: Solve for x
    x = 409,689,604,900/307,804
  6. Step 6: Final answer
    x = 1,331,008.06

Related Problems

Find third proportional to 153,902 and 320,035
Half scale
Find third proportional to 615,608 and 1,280,140
Double scale
Find third proportional to 307,806 and 640,074
Similar ratio
Find third proportional to 461,706 and 960,105
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.