Home / 280,716-623,640

Finding the Third Proportional to 280,716 and 623,640

Calculator

Solution

The third proportional to 280,716 and 623,640 is: 1,385,481.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,716 : 623,640 = 623,640 : x
  2. Step 2: Convert to fraction form
    280,716/623,640 = 623,640/x
  3. Step 3: Cross multiply
    280,716x = 623,640 × 623,640
  4. Step 4: Simplify right side
    280,716x = 388,926,849,600
  5. Step 5: Solve for x
    x = 388,926,849,600/280,716
  6. Step 6: Final answer
    x = 1,385,481.59

Related Problems

Find third proportional to 140,358 and 311,820
Half scale
Find third proportional to 561,432 and 1,247,280
Double scale
Find third proportional to 280,718 and 623,644
Similar ratio
Find third proportional to 421,074 and 935,460
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.