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Finding the Fourth Proportional to 676.10, 936.09 and 663.30

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Solution

The fourth proportional to 676.10, 936.09 and 663.30 is: 918.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.10 : 936.09 = 663.30 : x
  2. Step 2: Convert to fraction form
    676.10/936.09 = 663.30/x
  3. Step 3: Cross multiply
    676.10x = 936.09 × 663.30
  4. Step 4: Simplify right side
    676.10x = 620,908.50
  5. Step 5: Solve for x
    x = 620,908.50/676.10
  6. Step 6: Final answer
    x = 918.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.