Home / 272,818-643,104

Finding the Third Proportional to 272,818 and 643,104

Calculator

Solution

The third proportional to 272,818 and 643,104 is: 1,515,965.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,818 : 643,104 = 643,104 : x
  2. Step 2: Convert to fraction form
    272,818/643,104 = 643,104/x
  3. Step 3: Cross multiply
    272,818x = 643,104 × 643,104
  4. Step 4: Simplify right side
    272,818x = 413,582,754,816
  5. Step 5: Solve for x
    x = 413,582,754,816/272,818
  6. Step 6: Final answer
    x = 1,515,965.79

Related Problems

Find third proportional to 136,409 and 321,552
Half scale
Find third proportional to 545,636 and 1,286,208
Double scale
Find third proportional to 272,820 and 643,109
Similar ratio
Find third proportional to 409,227 and 964,656
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.