Home / 1,223.24-1,688.07-663.71

Finding the Fourth Proportional to 1,223.24, 1,688.07 and 663.71

Calculator

Solution

The fourth proportional to 1,223.24, 1,688.07 and 663.71 is: 915.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223.24 : 1,688.07 = 663.71 : x
  2. Step 2: Convert to fraction form
    1,223.24/1,688.07 = 663.71/x
  3. Step 3: Cross multiply
    1,223.24x = 1,688.07 × 663.71
  4. Step 4: Simplify right side
    1,223.24x = 1,120,380.50
  5. Step 5: Solve for x
    x = 1,120,380.50/1,223.24
  6. Step 6: Final answer
    x = 915.92

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.