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Finding the Fourth Proportional to 1,676.57, 2,511.21 and 809.06

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Solution

The fourth proportional to 1,676.57, 2,511.21 and 809.06 is: 1,211.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,676.57 : 2,511.21 = 809.06 : x
  2. Step 2: Convert to fraction form
    1,676.57/2,511.21 = 809.06/x
  3. Step 3: Cross multiply
    1,676.57x = 2,511.21 × 809.06
  4. Step 4: Simplify right side
    1,676.57x = 2,031,725.84
  5. Step 5: Solve for x
    x = 2,031,725.84/1,676.57
  6. Step 6: Final answer
    x = 1,211.83

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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.