Home / 64.93-89.61-40.39

Finding the Fourth Proportional to 64.93, 89.61 and 40.39

Calculator

Solution

The fourth proportional to 64.93, 89.61 and 40.39 is: 55.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.93 : 89.61 = 40.39 : x
  2. Step 2: Convert to fraction form
    64.93/89.61 = 40.39/x
  3. Step 3: Cross multiply
    64.93x = 89.61 × 40.39
  4. Step 4: Simplify right side
    64.93x = 3,618.70
  5. Step 5: Solve for x
    x = 3,618.70/64.93
  6. Step 6: Final answer
    x = 55.73

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.