Home / 129,086-279,618

Finding the Third Proportional to 129,086 and 279,618

Calculator

Solution

The third proportional to 129,086 and 279,618 is: 605,690.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,086 : 279,618 = 279,618 : x
  2. Step 2: Convert to fraction form
    129,086/279,618 = 279,618/x
  3. Step 3: Cross multiply
    129,086x = 279,618 × 279,618
  4. Step 4: Simplify right side
    129,086x = 78,186,225,924
  5. Step 5: Solve for x
    x = 78,186,225,924/129,086
  6. Step 6: Final answer
    x = 605,690.98

Related Problems

Find third proportional to 64,543 and 139,809
Half scale
Find third proportional to 258,172 and 559,236
Double scale
Find third proportional to 129,088 and 279,622
Similar ratio
Find third proportional to 193,629 and 419,427
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.