Home / 820.36-1,234.67-616

Finding the Fourth Proportional to 820.36, 1,234.67 and 616

Calculator

Solution

The fourth proportional to 820.36, 1,234.67 and 616 is: 927.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    820.36 : 1,234.67 = 616 : x
  2. Step 2: Convert to fraction form
    820.36/1,234.67 = 616/x
  3. Step 3: Cross multiply
    820.36x = 1,234.67 × 616
  4. Step 4: Simplify right side
    820.36x = 760,556.72
  5. Step 5: Solve for x
    x = 760,556.72/820.36
  6. Step 6: Final answer
    x = 927.10

Related Problems

Find fourth proportional to 410.18, 617.34 and 308
Half scale
Find fourth proportional to 1,640.72, 2,469.34 and 1,232
Double scale
Find fourth proportional to 821.36, 1,236.18 and 617
Similar ratio
Find fourth proportional to 1,230.54, 1,852.01 and 924
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.