Home / 1,213.56-1,821.12-444

Finding the Fourth Proportional to 1,213.56, 1,821.12 and 444

Calculator

Solution

The fourth proportional to 1,213.56, 1,821.12 and 444 is: 666.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.56 : 1,821.12 = 444 : x
  2. Step 2: Convert to fraction form
    1,213.56/1,821.12 = 444/x
  3. Step 3: Cross multiply
    1,213.56x = 1,821.12 × 444
  4. Step 4: Simplify right side
    1,213.56x = 808,577.28
  5. Step 5: Solve for x
    x = 808,577.28/1,213.56
  6. Step 6: Final answer
    x = 666.29

Related Problems

Find fourth proportional to 606.78, 910.56 and 222
Half scale
Find fourth proportional to 2,427.12, 3,642.24 and 888
Double scale
Find fourth proportional to 1,214.56, 1,822.62 and 445
Similar ratio
Find fourth proportional to 1,820.34, 2,731.68 and 666
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.