Home / 1,212.47-1,673.21-688.60

Finding the Fourth Proportional to 1,212.47, 1,673.21 and 688.60

Calculator

Solution

The fourth proportional to 1,212.47, 1,673.21 and 688.60 is: 950.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.47 : 1,673.21 = 688.60 : x
  2. Step 2: Convert to fraction form
    1,212.47/1,673.21 = 688.60/x
  3. Step 3: Cross multiply
    1,212.47x = 1,673.21 × 688.60
  4. Step 4: Simplify right side
    1,212.47x = 1,152,172.35
  5. Step 5: Solve for x
    x = 1,152,172.35/1,212.47
  6. Step 6: Final answer
    x = 950.27

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.