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Finding the Fourth Proportional to 639,192.88, 959,217 and 265,215.88

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Solution

The fourth proportional to 639,192.88, 959,217 and 265,215.88 is: 398,001.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,192.88 : 959,217 = 265,215.88 : x
  2. Step 2: Convert to fraction form
    639,192.88/959,217 = 265,215.88/x
  3. Step 3: Cross multiply
    639,192.88x = 959,217 × 265,215.88
  4. Step 4: Simplify right side
    639,192.88x = 254,399,580,765.96
  5. Step 5: Solve for x
    x = 254,399,580,765.96/639,192.88
  6. Step 6: Final answer
    x = 398,001.27

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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.