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Finding the Fourth Proportional to 388,644.89, 582,911.97 and 122,398.49

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Solution

The fourth proportional to 388,644.89, 582,911.97 and 122,398.49 is: 183,580.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,644.89 : 582,911.97 = 122,398.49 : x
  2. Step 2: Convert to fraction form
    388,644.89/582,911.97 = 122,398.49/x
  3. Step 3: Cross multiply
    388,644.89x = 582,911.97 × 122,398.49
  4. Step 4: Simplify right side
    388,644.89x = 71,347,542,016.37
  5. Step 5: Solve for x
    x = 71,347,542,016.37/388,644.89
  6. Step 6: Final answer
    x = 183,580.29

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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.