Home / 520,012-780,018-126,028

Finding the Fourth Proportional to 520,012, 780,018 and 126,028

Calculator

Solution

The fourth proportional to 520,012, 780,018 and 126,028 is: 189,042

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,012 : 780,018 = 126,028 : x
  2. Step 2: Convert to fraction form
    520,012/780,018 = 126,028/x
  3. Step 3: Cross multiply
    520,012x = 780,018 × 126,028
  4. Step 4: Simplify right side
    520,012x = 98,304,108,504
  5. Step 5: Solve for x
    x = 98,304,108,504/520,012
  6. Step 6: Final answer
    x = 189,042

Related Problems

Find fourth proportional to 260,006, 390,009 and 63,014
Half scale
Find fourth proportional to 1,040,024, 1,560,036 and 252,056
Double scale
Find fourth proportional to 520,013, 780,019.50 and 126,029
Similar ratio
Find fourth proportional to 780,018, 1,170,027 and 189,042
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.