Home / 278,540-418,428

Finding the Third Proportional to 278,540 and 418,428

Calculator

Solution

The third proportional to 278,540 and 418,428 is: 628,570.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,540 : 418,428 = 418,428 : x
  2. Step 2: Convert to fraction form
    278,540/418,428 = 418,428/x
  3. Step 3: Cross multiply
    278,540x = 418,428 × 418,428
  4. Step 4: Simplify right side
    278,540x = 175,081,991,184
  5. Step 5: Solve for x
    x = 175,081,991,184/278,540
  6. Step 6: Final answer
    x = 628,570.37

Related Problems

Find third proportional to 139,270 and 209,214
Half scale
Find third proportional to 557,080 and 836,856
Double scale
Find third proportional to 278,542 and 418,431
Similar ratio
Find third proportional to 417,810 and 627,642
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.