Home / 56.28-78.02-55.17

Finding the Fourth Proportional to 56.28, 78.02 and 55.17

Calculator

Solution

The fourth proportional to 56.28, 78.02 and 55.17 is: 76.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.28 : 78.02 = 55.17 : x
  2. Step 2: Convert to fraction form
    56.28/78.02 = 55.17/x
  3. Step 3: Cross multiply
    56.28x = 78.02 × 55.17
  4. Step 4: Simplify right side
    56.28x = 4,304.09
  5. Step 5: Solve for x
    x = 4,304.09/56.28
  6. Step 6: Final answer
    x = 76.48

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.