Home / 678.70-936.59-368.20

Finding the Fourth Proportional to 678.70, 936.59 and 368.20

Calculator

Solution

The fourth proportional to 678.70, 936.59 and 368.20 is: 508.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    678.70 : 936.59 = 368.20 : x
  2. Step 2: Convert to fraction form
    678.70/936.59 = 368.20/x
  3. Step 3: Cross multiply
    678.70x = 936.59 × 368.20
  4. Step 4: Simplify right side
    678.70x = 344,845.91
  5. Step 5: Solve for x
    x = 344,845.91/678.70
  6. Step 6: Final answer
    x = 508.10

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.