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Finding the Fourth Proportional to 1,903.85, 2,859.90 and 1,611.95

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Solution

The fourth proportional to 1,903.85, 2,859.90 and 1,611.95 is: 2,421.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,903.85 : 2,859.90 = 1,611.95 : x
  2. Step 2: Convert to fraction form
    1,903.85/2,859.90 = 1,611.95/x
  3. Step 3: Cross multiply
    1,903.85x = 2,859.90 × 1,611.95
  4. Step 4: Simplify right side
    1,903.85x = 4,609,993.45
  5. Step 5: Solve for x
    x = 4,609,993.45/1,903.85
  6. Step 6: Final answer
    x = 2,421.41

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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.