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Finding the Fourth Proportional to 3,396.76, 4,687.80 and 1,905.01

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Solution

The fourth proportional to 3,396.76, 4,687.80 and 1,905.01 is: 2,629.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,396.76 : 4,687.80 = 1,905.01 : x
  2. Step 2: Convert to fraction form
    3,396.76/4,687.80 = 1,905.01/x
  3. Step 3: Cross multiply
    3,396.76x = 4,687.80 × 1,905.01
  4. Step 4: Simplify right side
    3,396.76x = 8,930,305.88
  5. Step 5: Solve for x
    x = 8,930,305.88/3,396.76
  6. Step 6: Final answer
    x = 2,629.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.