Home / 1,115.46-1,674-621.36

Finding the Fourth Proportional to 1,115.46, 1,674 and 621.36

Calculator

Solution

The fourth proportional to 1,115.46, 1,674 and 621.36 is: 932.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.46 : 1,674 = 621.36 : x
  2. Step 2: Convert to fraction form
    1,115.46/1,674 = 621.36/x
  3. Step 3: Cross multiply
    1,115.46x = 1,674 × 621.36
  4. Step 4: Simplify right side
    1,115.46x = 1,040,156.64
  5. Step 5: Solve for x
    x = 1,040,156.64/1,115.46
  6. Step 6: Final answer
    x = 932.49

Related Problems

Find fourth proportional to 557.73, 837 and 310.68
Half scale
Find fourth proportional to 2,230.92, 3,348 and 1,242.72
Double scale
Find fourth proportional to 1,116.46, 1,675.50 and 622.36
Similar ratio
Find fourth proportional to 1,673.19, 2,511 and 932.04
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.