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Finding the Fourth Proportional to 629.95, 944.44 and 321.65

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Solution

The fourth proportional to 629.95, 944.44 and 321.65 is: 482.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.95 : 944.44 = 321.65 : x
  2. Step 2: Convert to fraction form
    629.95/944.44 = 321.65/x
  3. Step 3: Cross multiply
    629.95x = 944.44 × 321.65
  4. Step 4: Simplify right side
    629.95x = 303,779.13
  5. Step 5: Solve for x
    x = 303,779.13/629.95
  6. Step 6: Final answer
    x = 482.23

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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.