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Finding the Fourth Proportional to 391,959, 587,945.79 and 111,483.54

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Solution

The fourth proportional to 391,959, 587,945.79 and 111,483.54 is: 167,227.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,959 : 587,945.79 = 111,483.54 : x
  2. Step 2: Convert to fraction form
    391,959/587,945.79 = 111,483.54/x
  3. Step 3: Cross multiply
    391,959x = 587,945.79 × 111,483.54
  4. Step 4: Simplify right side
    391,959x = 65,546,277,997.30
  5. Step 5: Solve for x
    x = 65,546,277,997.30/391,959
  6. Step 6: Final answer
    x = 167,227.38

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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.