Home / 679.88-1,020-544.16

Finding the Fourth Proportional to 679.88, 1,020 and 544.16

Calculator

Solution

The fourth proportional to 679.88, 1,020 and 544.16 is: 816.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.88 : 1,020 = 544.16 : x
  2. Step 2: Convert to fraction form
    679.88/1,020 = 544.16/x
  3. Step 3: Cross multiply
    679.88x = 1,020 × 544.16
  4. Step 4: Simplify right side
    679.88x = 555,043.20
  5. Step 5: Solve for x
    x = 555,043.20/679.88
  6. Step 6: Final answer
    x = 816.38

Related Problems

Find fourth proportional to 339.94, 510 and 272.08
Half scale
Find fourth proportional to 1,359.76, 2,040 and 1,088.32
Double scale
Find fourth proportional to 680.88, 1,021.50 and 545.16
Similar ratio
Find fourth proportional to 1,019.82, 1,530 and 816.24
1.5x scale

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.