Home / 1,121.40-1,681.90-472.59

Finding the Fourth Proportional to 1,121.40, 1,681.90 and 472.59

Calculator

Solution

The fourth proportional to 1,121.40, 1,681.90 and 472.59 is: 708.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.40 : 1,681.90 = 472.59 : x
  2. Step 2: Convert to fraction form
    1,121.40/1,681.90 = 472.59/x
  3. Step 3: Cross multiply
    1,121.40x = 1,681.90 × 472.59
  4. Step 4: Simplify right side
    1,121.40x = 794,847.94
  5. Step 5: Solve for x
    x = 794,847.94/1,121.40
  6. Step 6: Final answer
    x = 708.80

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.