Home / 816-1,126.08-540

Finding the Fourth Proportional to 816, 1,126.08 and 540

Calculator

Solution

The fourth proportional to 816, 1,126.08 and 540 is: 745.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    816 : 1,126.08 = 540 : x
  2. Step 2: Convert to fraction form
    816/1,126.08 = 540/x
  3. Step 3: Cross multiply
    816x = 1,126.08 × 540
  4. Step 4: Simplify right side
    816x = 608,083.20
  5. Step 5: Solve for x
    x = 608,083.20/816
  6. Step 6: Final answer
    x = 745.20

Related Problems

Find fourth proportional to 408, 563.04 and 270
Half scale
Find fourth proportional to 1,632, 2,252.16 and 1,080
Double scale
Find fourth proportional to 817, 1,127.46 and 541
Similar ratio
Find fourth proportional to 1,224, 1,689.12 and 810
1.5x scale

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.