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Finding the Fourth Proportional to 639,833.22, 959,427.72 and 213,217.92

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Solution

The fourth proportional to 639,833.22, 959,427.72 and 213,217.92 is: 319,719.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,833.22 : 959,427.72 = 213,217.92 : x
  2. Step 2: Convert to fraction form
    639,833.22/959,427.72 = 213,217.92/x
  3. Step 3: Cross multiply
    639,833.22x = 959,427.72 × 213,217.92
  4. Step 4: Simplify right side
    639,833.22x = 204,567,182,848.74
  5. Step 5: Solve for x
    x = 204,567,182,848.74/639,833.22
  6. Step 6: Final answer
    x = 319,719.54

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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.