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Finding the Fourth Proportional to 311.41, 466.56 and 157.30

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Solution

The fourth proportional to 311.41, 466.56 and 157.30 is: 235.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.41 : 466.56 = 157.30 : x
  2. Step 2: Convert to fraction form
    311.41/466.56 = 157.30/x
  3. Step 3: Cross multiply
    311.41x = 466.56 × 157.30
  4. Step 4: Simplify right side
    311.41x = 73,389.89
  5. Step 5: Solve for x
    x = 73,389.89/311.41
  6. Step 6: Final answer
    x = 235.67

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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.