Home / 1,277-1,915.50-365

Finding the Fourth Proportional to 1,277, 1,915.50 and 365

Calculator

Solution

The fourth proportional to 1,277, 1,915.50 and 365 is: 547.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277 : 1,915.50 = 365 : x
  2. Step 2: Convert to fraction form
    1,277/1,915.50 = 365/x
  3. Step 3: Cross multiply
    1,277x = 1,915.50 × 365
  4. Step 4: Simplify right side
    1,277x = 699,157.50
  5. Step 5: Solve for x
    x = 699,157.50/1,277
  6. Step 6: Final answer
    x = 547.50

Related Problems

Find fourth proportional to 638.50, 957.75 and 182.50
Half scale
Find fourth proportional to 2,554, 3,831 and 730
Double scale
Find fourth proportional to 1,278, 1,917 and 366
Similar ratio
Find fourth proportional to 1,915.50, 2,873.25 and 547.50
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.