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Finding the Fourth Proportional to 318,108, 438,979.68 and 182,137.44

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Solution

The fourth proportional to 318,108, 438,979.68 and 182,137.44 is: 251,344.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,108 : 438,979.68 = 182,137.44 : x
  2. Step 2: Convert to fraction form
    318,108/438,979.68 = 182,137.44/x
  3. Step 3: Cross multiply
    318,108x = 438,979.68 × 182,137.44
  4. Step 4: Simplify right side
    318,108x = 79,954,635,127.22
  5. Step 5: Solve for x
    x = 79,954,635,127.22/318,108
  6. Step 6: Final answer
    x = 251,344.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.