Home / 950-1,310.72-618.72

Finding the Fourth Proportional to 950, 1,310.72 and 618.72

Calculator

Solution

The fourth proportional to 950, 1,310.72 and 618.72 is: 853.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    950 : 1,310.72 = 618.72 : x
  2. Step 2: Convert to fraction form
    950/1,310.72 = 618.72/x
  3. Step 3: Cross multiply
    950x = 1,310.72 × 618.72
  4. Step 4: Simplify right side
    950x = 810,968.68
  5. Step 5: Solve for x
    x = 810,968.68/950
  6. Step 6: Final answer
    x = 853.65

Related Problems

Find fourth proportional to 475, 655.36 and 309.36
Half scale
Find fourth proportional to 1,900, 2,621.44 and 1,237.44
Double scale
Find fourth proportional to 951, 1,312.10 and 619.72
Similar ratio
Find fourth proportional to 1,425, 1,966.08 and 928.08
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.