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Finding the Fourth Proportional to 3,328.90, 4,987.20 and 1,942.90

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Solution

The fourth proportional to 3,328.90, 4,987.20 and 1,942.90 is: 2,910.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,328.90 : 4,987.20 = 1,942.90 : x
  2. Step 2: Convert to fraction form
    3,328.90/4,987.20 = 1,942.90/x
  3. Step 3: Cross multiply
    3,328.90x = 4,987.20 × 1,942.90
  4. Step 4: Simplify right side
    3,328.90x = 9,689,630.88
  5. Step 5: Solve for x
    x = 9,689,630.88/3,328.90
  6. Step 6: Final answer
    x = 2,910.76

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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.