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Finding the Fourth Proportional to 3,138.99, 4,709.31 and 1,677.75

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Solution

The fourth proportional to 3,138.99, 4,709.31 and 1,677.75 is: 2,517.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.99 : 4,709.31 = 1,677.75 : x
  2. Step 2: Convert to fraction form
    3,138.99/4,709.31 = 1,677.75/x
  3. Step 3: Cross multiply
    3,138.99x = 4,709.31 × 1,677.75
  4. Step 4: Simplify right side
    3,138.99x = 7,901,044.85
  5. Step 5: Solve for x
    x = 7,901,044.85/3,138.99
  6. Step 6: Final answer
    x = 2,517.07

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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.