Home / 863.56-1,297.50-539.56

Finding the Fourth Proportional to 863.56, 1,297.50 and 539.56

Calculator

Solution

The fourth proportional to 863.56, 1,297.50 and 539.56 is: 810.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.56 : 1,297.50 = 539.56 : x
  2. Step 2: Convert to fraction form
    863.56/1,297.50 = 539.56/x
  3. Step 3: Cross multiply
    863.56x = 1,297.50 × 539.56
  4. Step 4: Simplify right side
    863.56x = 700,079.10
  5. Step 5: Solve for x
    x = 700,079.10/863.56
  6. Step 6: Final answer
    x = 810.69

Related Problems

Find fourth proportional to 431.78, 648.75 and 269.78
Half scale
Find fourth proportional to 1,727.12, 2,595 and 1,079.12
Double scale
Find fourth proportional to 864.56, 1,299 and 540.56
Similar ratio
Find fourth proportional to 1,295.34, 1,946.25 and 809.34
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.