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Finding the Fourth Proportional to 318.09, 476.97 and 112.51

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Solution

The fourth proportional to 318.09, 476.97 and 112.51 is: 168.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.09 : 476.97 = 112.51 : x
  2. Step 2: Convert to fraction form
    318.09/476.97 = 112.51/x
  3. Step 3: Cross multiply
    318.09x = 476.97 × 112.51
  4. Step 4: Simplify right side
    318.09x = 53,662.73
  5. Step 5: Solve for x
    x = 53,662.73/318.09
  6. Step 6: Final answer
    x = 168.70

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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.