Home / 1,050.42-1,575.63-320

Finding the Fourth Proportional to 1,050.42, 1,575.63 and 320

Calculator

Solution

The fourth proportional to 1,050.42, 1,575.63 and 320 is: 480

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,050.42 : 1,575.63 = 320 : x
  2. Step 2: Convert to fraction form
    1,050.42/1,575.63 = 320/x
  3. Step 3: Cross multiply
    1,050.42x = 1,575.63 × 320
  4. Step 4: Simplify right side
    1,050.42x = 504,201.60
  5. Step 5: Solve for x
    x = 504,201.60/1,050.42
  6. Step 6: Final answer
    x = 480

Related Problems

Find fourth proportional to 525.21, 787.82 and 160
Half scale
Find fourth proportional to 2,100.84, 3,151.26 and 640
Double scale
Find fourth proportional to 1,051.42, 1,577.13 and 321
Similar ratio
Find fourth proportional to 1,575.63, 2,363.45 and 480
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.