Home / 1,287.28-1,930.96-709.84

Finding the Fourth Proportional to 1,287.28, 1,930.96 and 709.84

Calculator

Solution

The fourth proportional to 1,287.28, 1,930.96 and 709.84 is: 1,064.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287.28 : 1,930.96 = 709.84 : x
  2. Step 2: Convert to fraction form
    1,287.28/1,930.96 = 709.84/x
  3. Step 3: Cross multiply
    1,287.28x = 1,930.96 × 709.84
  4. Step 4: Simplify right side
    1,287.28x = 1,370,672.65
  5. Step 5: Solve for x
    x = 1,370,672.65/1,287.28
  6. Step 6: Final answer
    x = 1,064.78

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.