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Finding the Fourth Proportional to 639.66, 882.73 and 363.66

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Solution

The fourth proportional to 639.66, 882.73 and 363.66 is: 501.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.66 : 882.73 = 363.66 : x
  2. Step 2: Convert to fraction form
    639.66/882.73 = 363.66/x
  3. Step 3: Cross multiply
    639.66x = 882.73 × 363.66
  4. Step 4: Simplify right side
    639.66x = 321,014.01
  5. Step 5: Solve for x
    x = 321,014.01/639.66
  6. Step 6: Final answer
    x = 501.85

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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.