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Finding the Fourth Proportional to 318.65, 477.99 and 196.65

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Solution

The fourth proportional to 318.65, 477.99 and 196.65 is: 294.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.65 : 477.99 = 196.65 : x
  2. Step 2: Convert to fraction form
    318.65/477.99 = 196.65/x
  3. Step 3: Cross multiply
    318.65x = 477.99 × 196.65
  4. Step 4: Simplify right side
    318.65x = 93,996.73
  5. Step 5: Solve for x
    x = 93,996.73/318.65
  6. Step 6: Final answer
    x = 294.99

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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.