Home / 139,272-305,243

Finding the Third Proportional to 139,272 and 305,243

Calculator

Solution

The third proportional to 139,272 and 305,243 is: 669,002.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,272 : 305,243 = 305,243 : x
  2. Step 2: Convert to fraction form
    139,272/305,243 = 305,243/x
  3. Step 3: Cross multiply
    139,272x = 305,243 × 305,243
  4. Step 4: Simplify right side
    139,272x = 93,173,289,049
  5. Step 5: Solve for x
    x = 93,173,289,049/139,272
  6. Step 6: Final answer
    x = 669,002.31

Related Problems

Find third proportional to 69,636 and 152,621.50
Half scale
Find third proportional to 278,544 and 610,486
Double scale
Find third proportional to 139,274 and 305,247
Similar ratio
Find third proportional to 208,908 and 457,864.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.