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Finding the Fourth Proportional to 676.66, 927.96 and 648.60

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Solution

The fourth proportional to 676.66, 927.96 and 648.60 is: 889.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.66 : 927.96 = 648.60 : x
  2. Step 2: Convert to fraction form
    676.66/927.96 = 648.60/x
  3. Step 3: Cross multiply
    676.66x = 927.96 × 648.60
  4. Step 4: Simplify right side
    676.66x = 601,874.86
  5. Step 5: Solve for x
    x = 601,874.86/676.66
  6. Step 6: Final answer
    x = 889.48

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.