Home / 772.72-1,066.50-478.12

Finding the Fourth Proportional to 772.72, 1,066.50 and 478.12

Calculator

Solution

The fourth proportional to 772.72, 1,066.50 and 478.12 is: 659.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.72 : 1,066.50 = 478.12 : x
  2. Step 2: Convert to fraction form
    772.72/1,066.50 = 478.12/x
  3. Step 3: Cross multiply
    772.72x = 1,066.50 × 478.12
  4. Step 4: Simplify right side
    772.72x = 509,914.98
  5. Step 5: Solve for x
    x = 509,914.98/772.72
  6. Step 6: Final answer
    x = 659.90

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.