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Finding the Fourth Proportional to 318.45, 476.60 and 190.29

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Solution

The fourth proportional to 318.45, 476.60 and 190.29 is: 284.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.45 : 476.60 = 190.29 : x
  2. Step 2: Convert to fraction form
    318.45/476.60 = 190.29/x
  3. Step 3: Cross multiply
    318.45x = 476.60 × 190.29
  4. Step 4: Simplify right side
    318.45x = 90,691.26
  5. Step 5: Solve for x
    x = 90,691.26/318.45
  6. Step 6: Final answer
    x = 284.79

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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.