Home / 318,626-678,724

Finding the Third Proportional to 318,626 and 678,724

Calculator

Solution

The third proportional to 318,626 and 678,724 is: 1,445,789.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,626 : 678,724 = 678,724 : x
  2. Step 2: Convert to fraction form
    318,626/678,724 = 678,724/x
  3. Step 3: Cross multiply
    318,626x = 678,724 × 678,724
  4. Step 4: Simplify right side
    318,626x = 460,666,268,176
  5. Step 5: Solve for x
    x = 460,666,268,176/318,626
  6. Step 6: Final answer
    x = 1,445,789.95

Related Problems

Find third proportional to 159,313 and 339,362
Half scale
Find third proportional to 637,252 and 1,357,448
Double scale
Find third proportional to 318,628 and 678,728
Similar ratio
Find third proportional to 477,939 and 1,018,086
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.