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Finding the Fourth Proportional to 2,657.64, 3,986.95 and 1,096.80

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Solution

The fourth proportional to 2,657.64, 3,986.95 and 1,096.80 is: 1,645.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,657.64 : 3,986.95 = 1,096.80 : x
  2. Step 2: Convert to fraction form
    2,657.64/3,986.95 = 1,096.80/x
  3. Step 3: Cross multiply
    2,657.64x = 3,986.95 × 1,096.80
  4. Step 4: Simplify right side
    2,657.64x = 4,372,874.31
  5. Step 5: Solve for x
    x = 4,372,874.31/2,657.64
  6. Step 6: Final answer
    x = 1,645.39

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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.