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Finding the Fourth Proportional to 639.16, 882.02 and 359.43

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Solution

The fourth proportional to 639.16, 882.02 and 359.43 is: 495.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.16 : 882.02 = 359.43 : x
  2. Step 2: Convert to fraction form
    639.16/882.02 = 359.43/x
  3. Step 3: Cross multiply
    639.16x = 882.02 × 359.43
  4. Step 4: Simplify right side
    639.16x = 317,018.24
  5. Step 5: Solve for x
    x = 317,018.24/639.16
  6. Step 6: Final answer
    x = 495.99

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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.