Home / 1,189.37-1,641.38-665.41

Finding the Fourth Proportional to 1,189.37, 1,641.38 and 665.41

Calculator

Solution

The fourth proportional to 1,189.37, 1,641.38 and 665.41 is: 918.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.37 : 1,641.38 = 665.41 : x
  2. Step 2: Convert to fraction form
    1,189.37/1,641.38 = 665.41/x
  3. Step 3: Cross multiply
    1,189.37x = 1,641.38 × 665.41
  4. Step 4: Simplify right side
    1,189.37x = 1,092,179.13
  5. Step 5: Solve for x
    x = 1,092,179.13/1,189.37
  6. Step 6: Final answer
    x = 918.28

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.