Home / 2,135.43-3,200.72-978.75

Finding the Fourth Proportional to 2,135.43, 3,200.72 and 978.75

Calculator

Solution

The fourth proportional to 2,135.43, 3,200.72 and 978.75 is: 1,467.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.43 : 3,200.72 = 978.75 : x
  2. Step 2: Convert to fraction form
    2,135.43/3,200.72 = 978.75/x
  3. Step 3: Cross multiply
    2,135.43x = 3,200.72 × 978.75
  4. Step 4: Simplify right side
    2,135.43x = 3,132,699.81
  5. Step 5: Solve for x
    x = 3,132,699.81/2,135.43
  6. Step 6: Final answer
    x = 1,467.01

Related Problems

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.