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Finding the Fourth Proportional to 640.94, 884.39 and 379.01

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Solution

The fourth proportional to 640.94, 884.39 and 379.01 is: 522.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.94 : 884.39 = 379.01 : x
  2. Step 2: Convert to fraction form
    640.94/884.39 = 379.01/x
  3. Step 3: Cross multiply
    640.94x = 884.39 × 379.01
  4. Step 4: Simplify right side
    640.94x = 335,192.97
  5. Step 5: Solve for x
    x = 335,192.97/640.94
  6. Step 6: Final answer
    x = 522.97

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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.