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Finding the Fourth Proportional to 2,072.12, 3,107.79 and 610.92

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Solution

The fourth proportional to 2,072.12, 3,107.79 and 610.92 is: 916.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,072.12 : 3,107.79 = 610.92 : x
  2. Step 2: Convert to fraction form
    2,072.12/3,107.79 = 610.92/x
  3. Step 3: Cross multiply
    2,072.12x = 3,107.79 × 610.92
  4. Step 4: Simplify right side
    2,072.12x = 1,898,611.07
  5. Step 5: Solve for x
    x = 1,898,611.07/2,072.12
  6. Step 6: Final answer
    x = 916.27

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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.