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Finding the Fourth Proportional to 311.15, 466.56 and 148.68

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Solution

The fourth proportional to 311.15, 466.56 and 148.68 is: 222.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.15 : 466.56 = 148.68 : x
  2. Step 2: Convert to fraction form
    311.15/466.56 = 148.68/x
  3. Step 3: Cross multiply
    311.15x = 466.56 × 148.68
  4. Step 4: Simplify right side
    311.15x = 69,368.14
  5. Step 5: Solve for x
    x = 69,368.14/311.15
  6. Step 6: Final answer
    x = 222.94

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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.