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Finding the Fourth Proportional to 4,991.10, 7,487.10 and 2,068.80

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Solution

The fourth proportional to 4,991.10, 7,487.10 and 2,068.80 is: 3,103.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,991.10 : 7,487.10 = 2,068.80 : x
  2. Step 2: Convert to fraction form
    4,991.10/7,487.10 = 2,068.80/x
  3. Step 3: Cross multiply
    4,991.10x = 7,487.10 × 2,068.80
  4. Step 4: Simplify right side
    4,991.10x = 15,489,312.48
  5. Step 5: Solve for x
    x = 15,489,312.48/4,991.10
  6. Step 6: Final answer
    x = 3,103.39

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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.