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Finding the Fourth Proportional to 676.73, 934.72 and 489.92

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Solution

The fourth proportional to 676.73, 934.72 and 489.92 is: 676.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.73 : 934.72 = 489.92 : x
  2. Step 2: Convert to fraction form
    676.73/934.72 = 489.92/x
  3. Step 3: Cross multiply
    676.73x = 934.72 × 489.92
  4. Step 4: Simplify right side
    676.73x = 457,938.02
  5. Step 5: Solve for x
    x = 457,938.02/676.73
  6. Step 6: Final answer
    x = 676.69

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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.