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Finding the Fourth Proportional to 2,638.54, 3,957.73 and 1,099.50

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Solution

The fourth proportional to 2,638.54, 3,957.73 and 1,099.50 is: 1,649.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,638.54 : 3,957.73 = 1,099.50 : x
  2. Step 2: Convert to fraction form
    2,638.54/3,957.73 = 1,099.50/x
  3. Step 3: Cross multiply
    2,638.54x = 3,957.73 × 1,099.50
  4. Step 4: Simplify right side
    2,638.54x = 4,351,524.14
  5. Step 5: Solve for x
    x = 4,351,524.14/2,638.54
  6. Step 6: Final answer
    x = 1,649.22

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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.