Home / 764.57-1,055.28-485.19

Finding the Fourth Proportional to 764.57, 1,055.28 and 485.19

Calculator

Solution

The fourth proportional to 764.57, 1,055.28 and 485.19 is: 669.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.57 : 1,055.28 = 485.19 : x
  2. Step 2: Convert to fraction form
    764.57/1,055.28 = 485.19/x
  3. Step 3: Cross multiply
    764.57x = 1,055.28 × 485.19
  4. Step 4: Simplify right side
    764.57x = 512,011.30
  5. Step 5: Solve for x
    x = 512,011.30/764.57
  6. Step 6: Final answer
    x = 669.67

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.