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Finding the Fourth Proportional to 676.27, 1,016.39 and 658.09

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Solution

The fourth proportional to 676.27, 1,016.39 and 658.09 is: 989.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.27 : 1,016.39 = 658.09 : x
  2. Step 2: Convert to fraction form
    676.27/1,016.39 = 658.09/x
  3. Step 3: Cross multiply
    676.27x = 1,016.39 × 658.09
  4. Step 4: Simplify right side
    676.27x = 668,876.10
  5. Step 5: Solve for x
    x = 668,876.10/676.27
  6. Step 6: Final answer
    x = 989.07

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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.