Home / 1,683.82-2,526-643.96

Finding the Fourth Proportional to 1,683.82, 2,526 and 643.96

Calculator

Solution

The fourth proportional to 1,683.82, 2,526 and 643.96 is: 966.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,683.82 : 2,526 = 643.96 : x
  2. Step 2: Convert to fraction form
    1,683.82/2,526 = 643.96/x
  3. Step 3: Cross multiply
    1,683.82x = 2,526 × 643.96
  4. Step 4: Simplify right side
    1,683.82x = 1,626,642.96
  5. Step 5: Solve for x
    x = 1,626,642.96/1,683.82
  6. Step 6: Final answer
    x = 966.04

Related Problems

Find fourth proportional to 841.91, 1,263 and 321.98
Half scale
Find fourth proportional to 3,367.64, 5,052 and 1,287.92
Double scale
Find fourth proportional to 1,684.82, 2,527.50 and 644.96
Similar ratio
Find fourth proportional to 2,525.73, 3,789 and 965.94
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.