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Finding the Fourth Proportional to 639.16, 882.05 and 359.41

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Solution

The fourth proportional to 639.16, 882.05 and 359.41 is: 495.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.16 : 882.05 = 359.41 : x
  2. Step 2: Convert to fraction form
    639.16/882.05 = 359.41/x
  3. Step 3: Cross multiply
    639.16x = 882.05 × 359.41
  4. Step 4: Simplify right side
    639.16x = 317,013.59
  5. Step 5: Solve for x
    x = 317,013.59/639.16
  6. Step 6: Final answer
    x = 495.98

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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.