Home / 1,260-1,890-576

Finding the Fourth Proportional to 1,260, 1,890 and 576

Calculator

Solution

The fourth proportional to 1,260, 1,890 and 576 is: 864

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260 : 1,890 = 576 : x
  2. Step 2: Convert to fraction form
    1,260/1,890 = 576/x
  3. Step 3: Cross multiply
    1,260x = 1,890 × 576
  4. Step 4: Simplify right side
    1,260x = 1,088,640
  5. Step 5: Solve for x
    x = 1,088,640/1,260
  6. Step 6: Final answer
    x = 864

Related Problems

Find fourth proportional to 630, 945 and 288
Half scale
Find fourth proportional to 2,520, 3,780 and 1,152
Double scale
Find fourth proportional to 1,261, 1,891.50 and 577
Similar ratio
Find fourth proportional to 1,890, 2,835 and 864
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.