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Finding the Fourth Proportional to 676.71, 927.76 and 664.41

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Solution

The fourth proportional to 676.71, 927.76 and 664.41 is: 910.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.71 : 927.76 = 664.41 : x
  2. Step 2: Convert to fraction form
    676.71/927.76 = 664.41/x
  3. Step 3: Cross multiply
    676.71x = 927.76 × 664.41
  4. Step 4: Simplify right side
    676.71x = 616,413.02
  5. Step 5: Solve for x
    x = 616,413.02/676.71
  6. Step 6: Final answer
    x = 910.90

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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.