Home / 1,189.25-1,641.17-665.29

Finding the Fourth Proportional to 1,189.25, 1,641.17 and 665.29

Calculator

Solution

The fourth proportional to 1,189.25, 1,641.17 and 665.29 is: 918.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.25 : 1,641.17 = 665.29 : x
  2. Step 2: Convert to fraction form
    1,189.25/1,641.17 = 665.29/x
  3. Step 3: Cross multiply
    1,189.25x = 1,641.17 × 665.29
  4. Step 4: Simplify right side
    1,189.25x = 1,091,842.46
  5. Step 5: Solve for x
    x = 1,091,842.46/1,189.25
  6. Step 6: Final answer
    x = 918.09

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.