Home / 2,611.12-3,909.36-1,915.60

Finding the Fourth Proportional to 2,611.12, 3,909.36 and 1,915.60

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Solution

The fourth proportional to 2,611.12, 3,909.36 and 1,915.60 is: 2,868.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,611.12 : 3,909.36 = 1,915.60 : x
  2. Step 2: Convert to fraction form
    2,611.12/3,909.36 = 1,915.60/x
  3. Step 3: Cross multiply
    2,611.12x = 3,909.36 × 1,915.60
  4. Step 4: Simplify right side
    2,611.12x = 7,488,770.02
  5. Step 5: Solve for x
    x = 7,488,770.02/2,611.12
  6. Step 6: Final answer
    x = 2,868.03

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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.