Home / 761.96-1,142.99-275.02

Finding the Fourth Proportional to 761.96, 1,142.99 and 275.02

Calculator

Solution

The fourth proportional to 761.96, 1,142.99 and 275.02 is: 412.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.96 : 1,142.99 = 275.02 : x
  2. Step 2: Convert to fraction form
    761.96/1,142.99 = 275.02/x
  3. Step 3: Cross multiply
    761.96x = 1,142.99 × 275.02
  4. Step 4: Simplify right side
    761.96x = 314,345.11
  5. Step 5: Solve for x
    x = 314,345.11/761.96
  6. Step 6: Final answer
    x = 412.55

Related Problems

Find fourth proportional to 380.98, 571.50 and 137.51
Half scale
Find fourth proportional to 1,523.92, 2,285.98 and 550.04
Double scale
Find fourth proportional to 762.96, 1,144.49 and 276.02
Similar ratio
Find fourth proportional to 1,142.94, 1,714.49 and 412.53
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.