Home / 286,638-400,905

Finding the Third Proportional to 286,638 and 400,905

Calculator

Solution

The third proportional to 286,638 and 400,905 is: 560,724.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,638 : 400,905 = 400,905 : x
  2. Step 2: Convert to fraction form
    286,638/400,905 = 400,905/x
  3. Step 3: Cross multiply
    286,638x = 400,905 × 400,905
  4. Step 4: Simplify right side
    286,638x = 160,724,819,025
  5. Step 5: Solve for x
    x = 160,724,819,025/286,638
  6. Step 6: Final answer
    x = 560,724.05

Related Problems

Find third proportional to 143,319 and 200,452.50
Half scale
Find third proportional to 573,276 and 801,810
Double scale
Find third proportional to 286,640 and 400,908
Similar ratio
Find third proportional to 429,957 and 601,357.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.