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Finding the Fourth Proportional to 379,387.89, 523,664.37 and 250,420.50

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Solution

The fourth proportional to 379,387.89, 523,664.37 and 250,420.50 is: 345,652.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,387.89 : 523,664.37 = 250,420.50 : x
  2. Step 2: Convert to fraction form
    379,387.89/523,664.37 = 250,420.50/x
  3. Step 3: Cross multiply
    379,387.89x = 523,664.37 × 250,420.50
  4. Step 4: Simplify right side
    379,387.89x = 131,136,293,367.59
  5. Step 5: Solve for x
    x = 131,136,293,367.59/379,387.89
  6. Step 6: Final answer
    x = 345,652.29

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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.