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Finding the Fourth Proportional to 489.86, 676.08 and 293.42

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Solution

The fourth proportional to 489.86, 676.08 and 293.42 is: 404.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.86 : 676.08 = 293.42 : x
  2. Step 2: Convert to fraction form
    489.86/676.08 = 293.42/x
  3. Step 3: Cross multiply
    489.86x = 676.08 × 293.42
  4. Step 4: Simplify right side
    489.86x = 198,375.39
  5. Step 5: Solve for x
    x = 198,375.39/489.86
  6. Step 6: Final answer
    x = 404.96

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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.