Home / 1,113.05-1,536-615.73

Finding the Fourth Proportional to 1,113.05, 1,536 and 615.73

Calculator

Solution

The fourth proportional to 1,113.05, 1,536 and 615.73 is: 849.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.05 : 1,536 = 615.73 : x
  2. Step 2: Convert to fraction form
    1,113.05/1,536 = 615.73/x
  3. Step 3: Cross multiply
    1,113.05x = 1,536 × 615.73
  4. Step 4: Simplify right side
    1,113.05x = 945,753.60
  5. Step 5: Solve for x
    x = 945,753.60/1,113.05
  6. Step 6: Final answer
    x = 849.70

Related Problems

Find fourth proportional to 556.53, 768 and 307.86
Half scale
Find fourth proportional to 2,226.10, 3,072 and 1,231.45
Double scale
Find fourth proportional to 1,114.05, 1,537.38 and 616.73
Similar ratio
Find fourth proportional to 1,669.58, 2,304 and 923.59
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.