Home / 940.80-1,410.78-291.39

Finding the Fourth Proportional to 940.80, 1,410.78 and 291.39

Calculator

Solution

The fourth proportional to 940.80, 1,410.78 and 291.39 is: 436.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.80 : 1,410.78 = 291.39 : x
  2. Step 2: Convert to fraction form
    940.80/1,410.78 = 291.39/x
  3. Step 3: Cross multiply
    940.80x = 1,410.78 × 291.39
  4. Step 4: Simplify right side
    940.80x = 411,087.18
  5. Step 5: Solve for x
    x = 411,087.18/940.80
  6. Step 6: Final answer
    x = 436.95

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.