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Finding the Fourth Proportional to 298.31, 411.66 and 165.53

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Solution

The fourth proportional to 298.31, 411.66 and 165.53 is: 228.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.31 : 411.66 = 165.53 : x
  2. Step 2: Convert to fraction form
    298.31/411.66 = 165.53/x
  3. Step 3: Cross multiply
    298.31x = 411.66 × 165.53
  4. Step 4: Simplify right side
    298.31x = 68,143.11
  5. Step 5: Solve for x
    x = 68,143.11/298.31
  6. Step 6: Final answer
    x = 228.43

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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.