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Finding the Fourth Proportional to 676.72, 934.24 and 455.84

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Solution

The fourth proportional to 676.72, 934.24 and 455.84 is: 629.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.72 : 934.24 = 455.84 : x
  2. Step 2: Convert to fraction form
    676.72/934.24 = 455.84/x
  3. Step 3: Cross multiply
    676.72x = 934.24 × 455.84
  4. Step 4: Simplify right side
    676.72x = 425,863.96
  5. Step 5: Solve for x
    x = 425,863.96/676.72
  6. Step 6: Final answer
    x = 629.31

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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.