Home / 1,029.50-1,544.25-260

Finding the Fourth Proportional to 1,029.50, 1,544.25 and 260

Calculator

Solution

The fourth proportional to 1,029.50, 1,544.25 and 260 is: 390

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029.50 : 1,544.25 = 260 : x
  2. Step 2: Convert to fraction form
    1,029.50/1,544.25 = 260/x
  3. Step 3: Cross multiply
    1,029.50x = 1,544.25 × 260
  4. Step 4: Simplify right side
    1,029.50x = 401,505
  5. Step 5: Solve for x
    x = 401,505/1,029.50
  6. Step 6: Final answer
    x = 390

Related Problems

Find fourth proportional to 514.75, 772.13 and 130
Half scale
Find fourth proportional to 2,059, 3,088.50 and 520
Double scale
Find fourth proportional to 1,030.50, 1,545.75 and 261
Similar ratio
Find fourth proportional to 1,544.25, 2,316.38 and 390
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.