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Finding the Fourth Proportional to 311.38, 466.78 and 165.10

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Solution

The fourth proportional to 311.38, 466.78 and 165.10 is: 247.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.38 : 466.78 = 165.10 : x
  2. Step 2: Convert to fraction form
    311.38/466.78 = 165.10/x
  3. Step 3: Cross multiply
    311.38x = 466.78 × 165.10
  4. Step 4: Simplify right side
    311.38x = 77,065.38
  5. Step 5: Solve for x
    x = 77,065.38/311.38
  6. Step 6: Final answer
    x = 247.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.