Home / 718.34-991.35-543.38

Finding the Fourth Proportional to 718.34, 991.35 and 543.38

Calculator

Solution

The fourth proportional to 718.34, 991.35 and 543.38 is: 749.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.34 : 991.35 = 543.38 : x
  2. Step 2: Convert to fraction form
    718.34/991.35 = 543.38/x
  3. Step 3: Cross multiply
    718.34x = 991.35 × 543.38
  4. Step 4: Simplify right side
    718.34x = 538,679.76
  5. Step 5: Solve for x
    x = 538,679.76/718.34
  6. Step 6: Final answer
    x = 749.90

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.