Home / 691.19-1,036.30-258.23

Finding the Fourth Proportional to 691.19, 1,036.30 and 258.23

Calculator

Solution

The fourth proportional to 691.19, 1,036.30 and 258.23 is: 387.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.19 : 1,036.30 = 258.23 : x
  2. Step 2: Convert to fraction form
    691.19/1,036.30 = 258.23/x
  3. Step 3: Cross multiply
    691.19x = 1,036.30 × 258.23
  4. Step 4: Simplify right side
    691.19x = 267,603.75
  5. Step 5: Solve for x
    x = 267,603.75/691.19
  6. Step 6: Final answer
    x = 387.16

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.