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Finding the Fourth Proportional to 317.11, 475.71 and 122.12

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Solution

The fourth proportional to 317.11, 475.71 and 122.12 is: 183.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.11 : 475.71 = 122.12 : x
  2. Step 2: Convert to fraction form
    317.11/475.71 = 122.12/x
  3. Step 3: Cross multiply
    317.11x = 475.71 × 122.12
  4. Step 4: Simplify right side
    317.11x = 58,093.71
  5. Step 5: Solve for x
    x = 58,093.71/317.11
  6. Step 6: Final answer
    x = 183.20

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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.