Home / 1,385.56-1,912.02-764.56

Finding the Fourth Proportional to 1,385.56, 1,912.02 and 764.56

Calculator

Solution

The fourth proportional to 1,385.56, 1,912.02 and 764.56 is: 1,055.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.56 : 1,912.02 = 764.56 : x
  2. Step 2: Convert to fraction form
    1,385.56/1,912.02 = 764.56/x
  3. Step 3: Cross multiply
    1,385.56x = 1,912.02 × 764.56
  4. Step 4: Simplify right side
    1,385.56x = 1,461,854.01
  5. Step 5: Solve for x
    x = 1,461,854.01/1,385.56
  6. Step 6: Final answer
    x = 1,055.06

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.