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Finding the Fourth Proportional to 639.36, 958.34 and 364.85

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Solution

The fourth proportional to 639.36, 958.34 and 364.85 is: 546.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.36 : 958.34 = 364.85 : x
  2. Step 2: Convert to fraction form
    639.36/958.34 = 364.85/x
  3. Step 3: Cross multiply
    639.36x = 958.34 × 364.85
  4. Step 4: Simplify right side
    639.36x = 349,650.35
  5. Step 5: Solve for x
    x = 349,650.35/639.36
  6. Step 6: Final answer
    x = 546.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.