Home / 567.71-781.81-511.21

Finding the Fourth Proportional to 567.71, 781.81 and 511.21

Calculator

Solution

The fourth proportional to 567.71, 781.81 and 511.21 is: 704.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.71 : 781.81 = 511.21 : x
  2. Step 2: Convert to fraction form
    567.71/781.81 = 511.21/x
  3. Step 3: Cross multiply
    567.71x = 781.81 × 511.21
  4. Step 4: Simplify right side
    567.71x = 399,672.38
  5. Step 5: Solve for x
    x = 399,672.38/567.71
  6. Step 6: Final answer
    x = 704.01

Related Problems

Find fourth proportional to 283.85, 390.91 and 255.61
Half scale
Find fourth proportional to 1,135.42, 1,563.63 and 1,022.42
Double scale
Find fourth proportional to 568.71, 783.19 and 512.21
Similar ratio
Find fourth proportional to 851.56, 1,172.72 and 766.82
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.