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Finding the Fourth Proportional to 298.45, 411.89 and 165.68

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Solution

The fourth proportional to 298.45, 411.89 and 165.68 is: 228.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.45 : 411.89 = 165.68 : x
  2. Step 2: Convert to fraction form
    298.45/411.89 = 165.68/x
  3. Step 3: Cross multiply
    298.45x = 411.89 × 165.68
  4. Step 4: Simplify right side
    298.45x = 68,241.94
  5. Step 5: Solve for x
    x = 68,241.94/298.45
  6. Step 6: Final answer
    x = 228.65

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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.