Home / 978,286.20-1,372,089-978,286.20

Finding the Fourth Proportional to 978,286.20, 1,372,089 and 978,286.20

Calculator

Solution

The fourth proportional to 978,286.20, 1,372,089 and 978,286.20 is: 1,372,089

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,286.20 : 1,372,089 = 978,286.20 : x
  2. Step 2: Convert to fraction form
    978,286.20/1,372,089 = 978,286.20/x
  3. Step 3: Cross multiply
    978,286.20x = 1,372,089 × 978,286.20
  4. Step 4: Simplify right side
    978,286.20x = 1,342,295,733,871.80
  5. Step 5: Solve for x
    x = 1,342,295,733,871.80/978,286.20
  6. Step 6: Final answer
    x = 1,372,089

Related Problems

Find fourth proportional to 489,143.10, 686,044.50 and 489,143.10
Half scale
Find fourth proportional to 1,956,572.40, 2,744,178 and 1,956,572.40
Double scale
Find fourth proportional to 978,287.20, 1,372,090.40 and 978,287.20
Similar ratio
Find fourth proportional to 1,467,429.30, 2,058,133.50 and 1,467,429.30
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.