Home / 1,213.57-1,820.35-301.57

Finding the Fourth Proportional to 1,213.57, 1,820.35 and 301.57

Calculator

Solution

The fourth proportional to 1,213.57, 1,820.35 and 301.57 is: 452.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.57 : 1,820.35 = 301.57 : x
  2. Step 2: Convert to fraction form
    1,213.57/1,820.35 = 301.57/x
  3. Step 3: Cross multiply
    1,213.57x = 1,820.35 × 301.57
  4. Step 4: Simplify right side
    1,213.57x = 548,952.34
  5. Step 5: Solve for x
    x = 548,952.34/1,213.57
  6. Step 6: Final answer
    x = 452.35

Related Problems

Find fourth proportional to 606.78, 910.17 and 150.78
Half scale
Find fourth proportional to 2,427.13, 3,640.69 and 603.13
Double scale
Find fourth proportional to 1,214.57, 1,821.84 and 302.57
Similar ratio
Find fourth proportional to 1,820.35, 2,730.52 and 452.35
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.