Home / 1,537.64-2,121.96-839

Finding the Fourth Proportional to 1,537.64, 2,121.96 and 839

Calculator

Solution

The fourth proportional to 1,537.64, 2,121.96 and 839 is: 1,157.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,537.64 : 2,121.96 = 839 : x
  2. Step 2: Convert to fraction form
    1,537.64/2,121.96 = 839/x
  3. Step 3: Cross multiply
    1,537.64x = 2,121.96 × 839
  4. Step 4: Simplify right side
    1,537.64x = 1,780,324.44
  5. Step 5: Solve for x
    x = 1,780,324.44/1,537.64
  6. Step 6: Final answer
    x = 1,157.83

Related Problems

Find fourth proportional to 768.82, 1,060.98 and 419.50
Half scale
Find fourth proportional to 3,075.28, 4,243.92 and 1,678
Double scale
Find fourth proportional to 1,538.64, 2,123.34 and 840
Similar ratio
Find fourth proportional to 2,306.46, 3,182.94 and 1,258.50
1.5x scale

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.