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Finding the Fourth Proportional to 639.82, 882.92 and 360.07

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Solution

The fourth proportional to 639.82, 882.92 and 360.07 is: 496.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.82 : 882.92 = 360.07 : x
  2. Step 2: Convert to fraction form
    639.82/882.92 = 360.07/x
  3. Step 3: Cross multiply
    639.82x = 882.92 × 360.07
  4. Step 4: Simplify right side
    639.82x = 317,913.00
  5. Step 5: Solve for x
    x = 317,913.00/639.82
  6. Step 6: Final answer
    x = 496.88

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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.