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Finding the Fourth Proportional to 325,239.31, 487,843.92 and 85,347.28

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Solution

The fourth proportional to 325,239.31, 487,843.92 and 85,347.28 is: 128,016.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,239.31 : 487,843.92 = 85,347.28 : x
  2. Step 2: Convert to fraction form
    325,239.31/487,843.92 = 85,347.28/x
  3. Step 3: Cross multiply
    325,239.31x = 487,843.92 × 85,347.28
  4. Step 4: Simplify right side
    325,239.31x = 41,636,151,636.54
  5. Step 5: Solve for x
    x = 41,636,151,636.54/325,239.31
  6. Step 6: Final answer
    x = 128,016.97

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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.