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Finding the Fourth Proportional to 3,611.95, 5,419.71 and 1,638.99

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Solution

The fourth proportional to 3,611.95, 5,419.71 and 1,638.99 is: 2,459.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611.95 : 5,419.71 = 1,638.99 : x
  2. Step 2: Convert to fraction form
    3,611.95/5,419.71 = 1,638.99/x
  3. Step 3: Cross multiply
    3,611.95x = 5,419.71 × 1,638.99
  4. Step 4: Simplify right side
    3,611.95x = 8,882,850.49
  5. Step 5: Solve for x
    x = 8,882,850.49/3,611.95
  6. Step 6: Final answer
    x = 2,459.30

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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.