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Finding the Fourth Proportional to 676.91, 934.28 and 397.29

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Solution

The fourth proportional to 676.91, 934.28 and 397.29 is: 548.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.91 : 934.28 = 397.29 : x
  2. Step 2: Convert to fraction form
    676.91/934.28 = 397.29/x
  3. Step 3: Cross multiply
    676.91x = 934.28 × 397.29
  4. Step 4: Simplify right side
    676.91x = 371,180.10
  5. Step 5: Solve for x
    x = 371,180.10/676.91
  6. Step 6: Final answer
    x = 548.34

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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.