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Finding the Fourth Proportional to 639,806.73, 959,611.68 and 213,349.97

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Solution

The fourth proportional to 639,806.73, 959,611.68 and 213,349.97 is: 319,992.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,806.73 : 959,611.68 = 213,349.97 : x
  2. Step 2: Convert to fraction form
    639,806.73/959,611.68 = 213,349.97/x
  3. Step 3: Cross multiply
    639,806.73x = 959,611.68 × 213,349.97
  4. Step 4: Simplify right side
    639,806.73x = 204,733,118,341.59
  5. Step 5: Solve for x
    x = 204,733,118,341.59/639,806.73
  6. Step 6: Final answer
    x = 319,992.13

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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.