Home / 522.08-720-405.44

Finding the Fourth Proportional to 522.08, 720 and 405.44

Calculator

Solution

The fourth proportional to 522.08, 720 and 405.44 is: 559.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.08 : 720 = 405.44 : x
  2. Step 2: Convert to fraction form
    522.08/720 = 405.44/x
  3. Step 3: Cross multiply
    522.08x = 720 × 405.44
  4. Step 4: Simplify right side
    522.08x = 291,916.80
  5. Step 5: Solve for x
    x = 291,916.80/522.08
  6. Step 6: Final answer
    x = 559.14

Related Problems

Find fourth proportional to 261.04, 360 and 202.72
Half scale
Find fourth proportional to 1,044.16, 1,440 and 810.88
Double scale
Find fourth proportional to 523.08, 721.38 and 406.44
Similar ratio
Find fourth proportional to 783.12, 1,080 and 608.16
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.