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Finding the Fourth Proportional to 2,137.55, 3,206.29 and 676.70

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Solution

The fourth proportional to 2,137.55, 3,206.29 and 676.70 is: 1,015.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,137.55 : 3,206.29 = 676.70 : x
  2. Step 2: Convert to fraction form
    2,137.55/3,206.29 = 676.70/x
  3. Step 3: Cross multiply
    2,137.55x = 3,206.29 × 676.70
  4. Step 4: Simplify right side
    2,137.55x = 2,169,696.44
  5. Step 5: Solve for x
    x = 2,169,696.44/2,137.55
  6. Step 6: Final answer
    x = 1,015.04

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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.