Home / 1,223.88-1,688.95-699.91

Finding the Fourth Proportional to 1,223.88, 1,688.95 and 699.91

Calculator

Solution

The fourth proportional to 1,223.88, 1,688.95 and 699.91 is: 965.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223.88 : 1,688.95 = 699.91 : x
  2. Step 2: Convert to fraction form
    1,223.88/1,688.95 = 699.91/x
  3. Step 3: Cross multiply
    1,223.88x = 1,688.95 × 699.91
  4. Step 4: Simplify right side
    1,223.88x = 1,182,112.99
  5. Step 5: Solve for x
    x = 1,182,112.99/1,223.88
  6. Step 6: Final answer
    x = 965.87

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.