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Finding the Fourth Proportional to 450.94, 622.43 and 319.99

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Solution

The fourth proportional to 450.94, 622.43 and 319.99 is: 441.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.94 : 622.43 = 319.99 : x
  2. Step 2: Convert to fraction form
    450.94/622.43 = 319.99/x
  3. Step 3: Cross multiply
    450.94x = 622.43 × 319.99
  4. Step 4: Simplify right side
    450.94x = 199,171.38
  5. Step 5: Solve for x
    x = 199,171.38/450.94
  6. Step 6: Final answer
    x = 441.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.