Home / 657.02-906.38-391.30

Finding the Fourth Proportional to 657.02, 906.38 and 391.30

Calculator

Solution

The fourth proportional to 657.02, 906.38 and 391.30 is: 539.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.02 : 906.38 = 391.30 : x
  2. Step 2: Convert to fraction form
    657.02/906.38 = 391.30/x
  3. Step 3: Cross multiply
    657.02x = 906.38 × 391.30
  4. Step 4: Simplify right side
    657.02x = 354,666.49
  5. Step 5: Solve for x
    x = 354,666.49/657.02
  6. Step 6: Final answer
    x = 539.81

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.