Home / 725-1,087.50-269

Finding the Fourth Proportional to 725, 1,087.50 and 269

Calculator

Solution

The fourth proportional to 725, 1,087.50 and 269 is: 403.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    725 : 1,087.50 = 269 : x
  2. Step 2: Convert to fraction form
    725/1,087.50 = 269/x
  3. Step 3: Cross multiply
    725x = 1,087.50 × 269
  4. Step 4: Simplify right side
    725x = 292,537.50
  5. Step 5: Solve for x
    x = 292,537.50/725
  6. Step 6: Final answer
    x = 403.50

Related Problems

Find fourth proportional to 362.50, 543.75 and 134.50
Half scale
Find fourth proportional to 1,450, 2,175 and 538
Double scale
Find fourth proportional to 726, 1,089 and 270
Similar ratio
Find fourth proportional to 1,087.50, 1,631.25 and 403.50
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.