Home / 287,720-431,585

Finding the Third Proportional to 287,720 and 431,585

Calculator

Solution

The third proportional to 287,720 and 431,585 is: 647,385.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,720 : 431,585 = 431,585 : x
  2. Step 2: Convert to fraction form
    287,720/431,585 = 431,585/x
  3. Step 3: Cross multiply
    287,720x = 431,585 × 431,585
  4. Step 4: Simplify right side
    287,720x = 186,265,612,225
  5. Step 5: Solve for x
    x = 186,265,612,225/287,720
  6. Step 6: Final answer
    x = 647,385.00

Related Problems

Find third proportional to 143,860 and 215,792.50
Half scale
Find third proportional to 575,440 and 863,170
Double scale
Find third proportional to 287,722 and 431,588
Similar ratio
Find third proportional to 431,580 and 647,377.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.