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Finding the Fourth Proportional to 639.72, 958.62 and 350.76

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Solution

The fourth proportional to 639.72, 958.62 and 350.76 is: 525.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.72 : 958.62 = 350.76 : x
  2. Step 2: Convert to fraction form
    639.72/958.62 = 350.76/x
  3. Step 3: Cross multiply
    639.72x = 958.62 × 350.76
  4. Step 4: Simplify right side
    639.72x = 336,245.55
  5. Step 5: Solve for x
    x = 336,245.55/639.72
  6. Step 6: Final answer
    x = 525.61

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