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Finding the Fourth Proportional to 489.91, 676.09 and 268.86

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Solution

The fourth proportional to 489.91, 676.09 and 268.86 is: 371.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.91 : 676.09 = 268.86 : x
  2. Step 2: Convert to fraction form
    489.91/676.09 = 268.86/x
  3. Step 3: Cross multiply
    489.91x = 676.09 × 268.86
  4. Step 4: Simplify right side
    489.91x = 181,775.25
  5. Step 5: Solve for x
    x = 181,775.25/489.91
  6. Step 6: Final answer
    x = 371.04

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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.