Home / 1,027.71-1,540.62-378

Finding the Fourth Proportional to 1,027.71, 1,540.62 and 378

Calculator

Solution

The fourth proportional to 1,027.71, 1,540.62 and 378 is: 566.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,027.71 : 1,540.62 = 378 : x
  2. Step 2: Convert to fraction form
    1,027.71/1,540.62 = 378/x
  3. Step 3: Cross multiply
    1,027.71x = 1,540.62 × 378
  4. Step 4: Simplify right side
    1,027.71x = 582,354.36
  5. Step 5: Solve for x
    x = 582,354.36/1,027.71
  6. Step 6: Final answer
    x = 566.65

Related Problems

Find fourth proportional to 513.86, 770.31 and 189
Half scale
Find fourth proportional to 2,055.42, 3,081.24 and 756
Double scale
Find fourth proportional to 1,028.71, 1,542.12 and 379
Similar ratio
Find fourth proportional to 1,541.57, 2,310.93 and 567
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.