Home / 871.32-1,306-563.74

Finding the Fourth Proportional to 871.32, 1,306 and 563.74

Calculator

Solution

The fourth proportional to 871.32, 1,306 and 563.74 is: 844.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.32 : 1,306 = 563.74 : x
  2. Step 2: Convert to fraction form
    871.32/1,306 = 563.74/x
  3. Step 3: Cross multiply
    871.32x = 1,306 × 563.74
  4. Step 4: Simplify right side
    871.32x = 736,244.44
  5. Step 5: Solve for x
    x = 736,244.44/871.32
  6. Step 6: Final answer
    x = 844.98

Related Problems

Find fourth proportional to 435.66, 653 and 281.87
Half scale
Find fourth proportional to 1,742.64, 2,612 and 1,127.48
Double scale
Find fourth proportional to 872.32, 1,307.50 and 564.74
Similar ratio
Find fourth proportional to 1,306.98, 1,959 and 845.61
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.