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Finding the Fourth Proportional to 379,167.86, 523,255.22 and 215,816.39

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Solution

The fourth proportional to 379,167.86, 523,255.22 and 215,816.39 is: 297,828.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,167.86 : 523,255.22 = 215,816.39 : x
  2. Step 2: Convert to fraction form
    379,167.86/523,255.22 = 215,816.39/x
  3. Step 3: Cross multiply
    379,167.86x = 523,255.22 × 215,816.39
  4. Step 4: Simplify right side
    379,167.86x = 112,927,052,629.06
  5. Step 5: Solve for x
    x = 112,927,052,629.06/379,167.86
  6. Step 6: Final answer
    x = 297,828.65

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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.