Home / 866-1,299-249.66

Finding the Fourth Proportional to 866, 1,299 and 249.66

Calculator

Solution

The fourth proportional to 866, 1,299 and 249.66 is: 374.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    866 : 1,299 = 249.66 : x
  2. Step 2: Convert to fraction form
    866/1,299 = 249.66/x
  3. Step 3: Cross multiply
    866x = 1,299 × 249.66
  4. Step 4: Simplify right side
    866x = 324,308.34
  5. Step 5: Solve for x
    x = 324,308.34/866
  6. Step 6: Final answer
    x = 374.49

Related Problems

Find fourth proportional to 433, 649.50 and 124.83
Half scale
Find fourth proportional to 1,732, 2,598 and 499.32
Double scale
Find fourth proportional to 867, 1,300.50 and 250.66
Similar ratio
Find fourth proportional to 1,299, 1,948.50 and 374.49
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.