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Finding the Fourth Proportional to 640.39, 884.03 and 483.09

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Solution

The fourth proportional to 640.39, 884.03 and 483.09 is: 666.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.39 : 884.03 = 483.09 : x
  2. Step 2: Convert to fraction form
    640.39/884.03 = 483.09/x
  3. Step 3: Cross multiply
    640.39x = 884.03 × 483.09
  4. Step 4: Simplify right side
    640.39x = 427,061.63
  5. Step 5: Solve for x
    x = 427,061.63/640.39
  6. Step 6: Final answer
    x = 666.88

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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.