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Finding the Fourth Proportional to 2,759.05, 4,138.62 and 679.06

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Solution

The fourth proportional to 2,759.05, 4,138.62 and 679.06 is: 1,018.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,759.05 : 4,138.62 = 679.06 : x
  2. Step 2: Convert to fraction form
    2,759.05/4,138.62 = 679.06/x
  3. Step 3: Cross multiply
    2,759.05x = 4,138.62 × 679.06
  4. Step 4: Simplify right side
    2,759.05x = 2,810,371.30
  5. Step 5: Solve for x
    x = 2,810,371.30/2,759.05
  6. Step 6: Final answer
    x = 1,018.60

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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.