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Finding the Fourth Proportional to 321.63, 482.49 and 105.16

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Solution

The fourth proportional to 321.63, 482.49 and 105.16 is: 157.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.63 : 482.49 = 105.16 : x
  2. Step 2: Convert to fraction form
    321.63/482.49 = 105.16/x
  3. Step 3: Cross multiply
    321.63x = 482.49 × 105.16
  4. Step 4: Simplify right side
    321.63x = 50,738.65
  5. Step 5: Solve for x
    x = 50,738.65/321.63
  6. Step 6: Final answer
    x = 157.75

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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.