Home / 218,748-312,809

Finding the Third Proportional to 218,748 and 312,809

Calculator

Solution

The third proportional to 218,748 and 312,809 is: 447,315.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,748 : 312,809 = 312,809 : x
  2. Step 2: Convert to fraction form
    218,748/312,809 = 312,809/x
  3. Step 3: Cross multiply
    218,748x = 312,809 × 312,809
  4. Step 4: Simplify right side
    218,748x = 97,849,470,481
  5. Step 5: Solve for x
    x = 97,849,470,481/218,748
  6. Step 6: Final answer
    x = 447,315.95

Related Problems

Find third proportional to 109,374 and 156,404.50
Half scale
Find third proportional to 437,496 and 625,618
Double scale
Find third proportional to 218,750 and 312,812
Similar ratio
Find third proportional to 328,122 and 469,213.50
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.