Home / 666.66-998.70-319.51

Finding the Fourth Proportional to 666.66, 998.70 and 319.51

Calculator

Solution

The fourth proportional to 666.66, 998.70 and 319.51 is: 478.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.66 : 998.70 = 319.51 : x
  2. Step 2: Convert to fraction form
    666.66/998.70 = 319.51/x
  3. Step 3: Cross multiply
    666.66x = 998.70 × 319.51
  4. Step 4: Simplify right side
    666.66x = 319,094.69
  5. Step 5: Solve for x
    x = 319,094.69/666.66
  6. Step 6: Final answer
    x = 478.64

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.