Home / 321,347-678,814

Finding the Third Proportional to 321,347 and 678,814

Calculator

Solution

The third proportional to 321,347 and 678,814 is: 1,433,927.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,347 : 678,814 = 678,814 : x
  2. Step 2: Convert to fraction form
    321,347/678,814 = 678,814/x
  3. Step 3: Cross multiply
    321,347x = 678,814 × 678,814
  4. Step 4: Simplify right side
    321,347x = 460,788,446,596
  5. Step 5: Solve for x
    x = 460,788,446,596/321,347
  6. Step 6: Final answer
    x = 1,433,927.96

Related Problems

Find third proportional to 160,673.50 and 339,407
Half scale
Find third proportional to 642,694 and 1,357,628
Double scale
Find third proportional to 321,349 and 678,818
Similar ratio
Find third proportional to 482,020.50 and 1,018,221
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.