Home / 1,511.25-2,083.28-921.36

Finding the Fourth Proportional to 1,511.25, 2,083.28 and 921.36

Calculator

Solution

The fourth proportional to 1,511.25, 2,083.28 and 921.36 is: 1,270.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.25 : 2,083.28 = 921.36 : x
  2. Step 2: Convert to fraction form
    1,511.25/2,083.28 = 921.36/x
  3. Step 3: Cross multiply
    1,511.25x = 2,083.28 × 921.36
  4. Step 4: Simplify right side
    1,511.25x = 1,919,450.86
  5. Step 5: Solve for x
    x = 1,919,450.86/1,511.25
  6. Step 6: Final answer
    x = 1,270.11

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.