Home / 287,156-631,360

Finding the Third Proportional to 287,156 and 631,360

Calculator

Solution

The third proportional to 287,156 and 631,360 is: 1,388,149.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,156 : 631,360 = 631,360 : x
  2. Step 2: Convert to fraction form
    287,156/631,360 = 631,360/x
  3. Step 3: Cross multiply
    287,156x = 631,360 × 631,360
  4. Step 4: Simplify right side
    287,156x = 398,615,449,600
  5. Step 5: Solve for x
    x = 398,615,449,600/287,156
  6. Step 6: Final answer
    x = 1,388,149.47

Related Problems

Find third proportional to 143,578 and 315,680
Half scale
Find third proportional to 574,312 and 1,262,720
Double scale
Find third proportional to 287,158 and 631,364
Similar ratio
Find third proportional to 430,734 and 947,040
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.