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Finding the Fourth Proportional to 629.19, 942.08 and 321.18

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Solution

The fourth proportional to 629.19, 942.08 and 321.18 is: 480.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.19 : 942.08 = 321.18 : x
  2. Step 2: Convert to fraction form
    629.19/942.08 = 321.18/x
  3. Step 3: Cross multiply
    629.19x = 942.08 × 321.18
  4. Step 4: Simplify right side
    629.19x = 302,575.65
  5. Step 5: Solve for x
    x = 302,575.65/629.19
  6. Step 6: Final answer
    x = 480.90

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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.