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Finding the Fourth Proportional to 489.90, 676.05 and 268.84

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Solution

The fourth proportional to 489.90, 676.05 and 268.84 is: 370.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.90 : 676.05 = 268.84 : x
  2. Step 2: Convert to fraction form
    489.90/676.05 = 268.84/x
  3. Step 3: Cross multiply
    489.90x = 676.05 × 268.84
  4. Step 4: Simplify right side
    489.90x = 181,745.32
  5. Step 5: Solve for x
    x = 181,745.32/489.90
  6. Step 6: Final answer
    x = 370.99

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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.