Home / 765.56-1,148.81-278.65

Finding the Fourth Proportional to 765.56, 1,148.81 and 278.65

Calculator

Solution

The fourth proportional to 765.56, 1,148.81 and 278.65 is: 418.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    765.56 : 1,148.81 = 278.65 : x
  2. Step 2: Convert to fraction form
    765.56/1,148.81 = 278.65/x
  3. Step 3: Cross multiply
    765.56x = 1,148.81 × 278.65
  4. Step 4: Simplify right side
    765.56x = 320,115.95
  5. Step 5: Solve for x
    x = 320,115.95/765.56
  6. Step 6: Final answer
    x = 418.14

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.