Home / 1,087.34-1,631-265.60

Finding the Fourth Proportional to 1,087.34, 1,631 and 265.60

Calculator

Solution

The fourth proportional to 1,087.34, 1,631 and 265.60 is: 398.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.34 : 1,631 = 265.60 : x
  2. Step 2: Convert to fraction form
    1,087.34/1,631 = 265.60/x
  3. Step 3: Cross multiply
    1,087.34x = 1,631 × 265.60
  4. Step 4: Simplify right side
    1,087.34x = 433,193.60
  5. Step 5: Solve for x
    x = 433,193.60/1,087.34
  6. Step 6: Final answer
    x = 398.40

Related Problems

Find fourth proportional to 543.67, 815.50 and 132.80
Half scale
Find fourth proportional to 2,174.68, 3,262 and 531.20
Double scale
Find fourth proportional to 1,088.34, 1,632.50 and 266.60
Similar ratio
Find fourth proportional to 1,631.01, 2,446.50 and 398.40
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.