Home / 257,618-378,964

Finding the Third Proportional to 257,618 and 378,964

Calculator

Solution

The third proportional to 257,618 and 378,964 is: 557,467.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,618 : 378,964 = 378,964 : x
  2. Step 2: Convert to fraction form
    257,618/378,964 = 378,964/x
  3. Step 3: Cross multiply
    257,618x = 378,964 × 378,964
  4. Step 4: Simplify right side
    257,618x = 143,613,713,296
  5. Step 5: Solve for x
    x = 143,613,713,296/257,618
  6. Step 6: Final answer
    x = 557,467.70

Related Problems

Find third proportional to 128,809 and 189,482
Half scale
Find third proportional to 515,236 and 757,928
Double scale
Find third proportional to 257,620 and 378,967
Similar ratio
Find third proportional to 386,427 and 568,446
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.