Home / 440-631

Finding the Third Proportional to 440 and 631

Calculator

Solution

The third proportional to 440 and 631 is: 904.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    440 : 631 = 631 : x
  2. Step 2: Convert to fraction form
    440/631 = 631/x
  3. Step 3: Cross multiply
    440x = 631 × 631
  4. Step 4: Simplify right side
    440x = 398,161
  5. Step 5: Solve for x
    x = 398,161/440
  6. Step 6: Final answer
    x = 904.91

Related Problems

Find third proportional to 220 and 315.50
Half scale
Find third proportional to 880 and 1,262
Double scale
Find third proportional to 442 and 634
Similar ratio
Find third proportional to 660 and 946.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.