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Finding the Fourth Proportional to 2,487.60, 3,727.80 and 1,099.80

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Solution

The fourth proportional to 2,487.60, 3,727.80 and 1,099.80 is: 1,648.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,487.60 : 3,727.80 = 1,099.80 : x
  2. Step 2: Convert to fraction form
    2,487.60/3,727.80 = 1,099.80/x
  3. Step 3: Cross multiply
    2,487.60x = 3,727.80 × 1,099.80
  4. Step 4: Simplify right side
    2,487.60x = 4,099,834.44
  5. Step 5: Solve for x
    x = 4,099,834.44/2,487.60
  6. Step 6: Final answer
    x = 1,648.11

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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.