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Finding the Fourth Proportional to 2,690.70, 4,028.01 and 1,647.42

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Solution

The fourth proportional to 2,690.70, 4,028.01 and 1,647.42 is: 2,466.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.70 : 4,028.01 = 1,647.42 : x
  2. Step 2: Convert to fraction form
    2,690.70/4,028.01 = 1,647.42/x
  3. Step 3: Cross multiply
    2,690.70x = 4,028.01 × 1,647.42
  4. Step 4: Simplify right side
    2,690.70x = 6,635,824.23
  5. Step 5: Solve for x
    x = 6,635,824.23/2,690.70
  6. Step 6: Final answer
    x = 2,466.21

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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.