Home / 211.30-291.09-202.30

Finding the Fourth Proportional to 211.30, 291.09 and 202.30

Calculator

Solution

The fourth proportional to 211.30, 291.09 and 202.30 is: 278.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.30 : 291.09 = 202.30 : x
  2. Step 2: Convert to fraction form
    211.30/291.09 = 202.30/x
  3. Step 3: Cross multiply
    211.30x = 291.09 × 202.30
  4. Step 4: Simplify right side
    211.30x = 58,887.51
  5. Step 5: Solve for x
    x = 58,887.51/211.30
  6. Step 6: Final answer
    x = 278.69

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.