Home / 811.70-1,216-536.98

Finding the Fourth Proportional to 811.70, 1,216 and 536.98

Calculator

Solution

The fourth proportional to 811.70, 1,216 and 536.98 is: 804.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    811.70 : 1,216 = 536.98 : x
  2. Step 2: Convert to fraction form
    811.70/1,216 = 536.98/x
  3. Step 3: Cross multiply
    811.70x = 1,216 × 536.98
  4. Step 4: Simplify right side
    811.70x = 652,967.68
  5. Step 5: Solve for x
    x = 652,967.68/811.70
  6. Step 6: Final answer
    x = 804.44

Related Problems

Find fourth proportional to 405.85, 608 and 268.49
Half scale
Find fourth proportional to 1,623.40, 2,432 and 1,073.96
Double scale
Find fourth proportional to 812.70, 1,217.50 and 537.98
Similar ratio
Find fourth proportional to 1,217.55, 1,824 and 805.47
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.