Home / 386.78-533.76-212.13

Finding the Fourth Proportional to 386.78, 533.76 and 212.13

Calculator

Solution

The fourth proportional to 386.78, 533.76 and 212.13 is: 292.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.78 : 533.76 = 212.13 : x
  2. Step 2: Convert to fraction form
    386.78/533.76 = 212.13/x
  3. Step 3: Cross multiply
    386.78x = 533.76 × 212.13
  4. Step 4: Simplify right side
    386.78x = 113,226.51
  5. Step 5: Solve for x
    x = 113,226.51/386.78
  6. Step 6: Final answer
    x = 292.74

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.