Home / 287,686-440,289

Finding the Third Proportional to 287,686 and 440,289

Calculator

Solution

The third proportional to 287,686 and 440,289 is: 673,840.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,686 : 440,289 = 440,289 : x
  2. Step 2: Convert to fraction form
    287,686/440,289 = 440,289/x
  3. Step 3: Cross multiply
    287,686x = 440,289 × 440,289
  4. Step 4: Simplify right side
    287,686x = 193,854,403,521
  5. Step 5: Solve for x
    x = 193,854,403,521/287,686
  6. Step 6: Final answer
    x = 673,840.24

Related Problems

Find third proportional to 143,843 and 220,144.50
Half scale
Find third proportional to 575,372 and 880,578
Double scale
Find third proportional to 287,688 and 440,292
Similar ratio
Find third proportional to 431,529 and 660,433.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.