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Finding the Fourth Proportional to 311.65, 467.20 and 157.36

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Solution

The fourth proportional to 311.65, 467.20 and 157.36 is: 235.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.65 : 467.20 = 157.36 : x
  2. Step 2: Convert to fraction form
    311.65/467.20 = 157.36/x
  3. Step 3: Cross multiply
    311.65x = 467.20 × 157.36
  4. Step 4: Simplify right side
    311.65x = 73,518.59
  5. Step 5: Solve for x
    x = 73,518.59/311.65
  6. Step 6: Final answer
    x = 235.90

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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.