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Finding the Fourth Proportional to 317.45, 475.96 and 122.29

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Solution

The fourth proportional to 317.45, 475.96 and 122.29 is: 183.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.45 : 475.96 = 122.29 : x
  2. Step 2: Convert to fraction form
    317.45/475.96 = 122.29/x
  3. Step 3: Cross multiply
    317.45x = 475.96 × 122.29
  4. Step 4: Simplify right side
    317.45x = 58,205.44
  5. Step 5: Solve for x
    x = 58,205.44/317.45
  6. Step 6: Final answer
    x = 183.35

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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.