Home / 990.56-1,485.85-260.14

Finding the Fourth Proportional to 990.56, 1,485.85 and 260.14

Calculator

Solution

The fourth proportional to 990.56, 1,485.85 and 260.14 is: 390.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.56 : 1,485.85 = 260.14 : x
  2. Step 2: Convert to fraction form
    990.56/1,485.85 = 260.14/x
  3. Step 3: Cross multiply
    990.56x = 1,485.85 × 260.14
  4. Step 4: Simplify right side
    990.56x = 386,529.02
  5. Step 5: Solve for x
    x = 386,529.02/990.56
  6. Step 6: Final answer
    x = 390.21

Related Problems

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.