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Finding the Fourth Proportional to 639,442.73, 958,956.44 and 212,863.97

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Solution

The fourth proportional to 639,442.73, 958,956.44 and 212,863.97 is: 319,226.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,442.73 : 958,956.44 = 212,863.97 : x
  2. Step 2: Convert to fraction form
    639,442.73/958,956.44 = 212,863.97/x
  3. Step 3: Cross multiply
    639,442.73x = 958,956.44 × 212,863.97
  4. Step 4: Simplify right side
    639,442.73x = 204,127,273,811.15
  5. Step 5: Solve for x
    x = 204,127,273,811.15/639,442.73
  6. Step 6: Final answer
    x = 319,226.83

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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.