Home / 871-1,306.50-293.88

Finding the Fourth Proportional to 871, 1,306.50 and 293.88

Calculator

Solution

The fourth proportional to 871, 1,306.50 and 293.88 is: 440.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    871 : 1,306.50 = 293.88 : x
  2. Step 2: Convert to fraction form
    871/1,306.50 = 293.88/x
  3. Step 3: Cross multiply
    871x = 1,306.50 × 293.88
  4. Step 4: Simplify right side
    871x = 383,954.22
  5. Step 5: Solve for x
    x = 383,954.22/871
  6. Step 6: Final answer
    x = 440.82

Related Problems

Find fourth proportional to 435.50, 653.25 and 146.94
Half scale
Find fourth proportional to 1,742, 2,613 and 587.76
Double scale
Find fourth proportional to 872, 1,308 and 294.88
Similar ratio
Find fourth proportional to 1,306.50, 1,959.75 and 440.82
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.