Home / 1,257.76-1,886.08-488

Finding the Fourth Proportional to 1,257.76, 1,886.08 and 488

Calculator

Solution

The fourth proportional to 1,257.76, 1,886.08 and 488 is: 731.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.76 : 1,886.08 = 488 : x
  2. Step 2: Convert to fraction form
    1,257.76/1,886.08 = 488/x
  3. Step 3: Cross multiply
    1,257.76x = 1,886.08 × 488
  4. Step 4: Simplify right side
    1,257.76x = 920,407.04
  5. Step 5: Solve for x
    x = 920,407.04/1,257.76
  6. Step 6: Final answer
    x = 731.78

Related Problems

Find fourth proportional to 628.88, 943.04 and 244
Half scale
Find fourth proportional to 2,515.52, 3,772.16 and 976
Double scale
Find fourth proportional to 1,258.76, 1,887.58 and 489
Similar ratio
Find fourth proportional to 1,886.64, 2,829.12 and 732
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.